SecurityvulnsSECURITYVULNS:DOC:24794Cisco Security Advisory: Cisco IOS Software Network Address Translation Vulnerabilities
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Cisco Security Advisory: Cisco IOS Software Network Address
Translation Vulnerabilities
Advisory ID: cisco-sa-20100922-nat
http://www.cisco.com/warp/public/707/cisco-sa-20100922-nat.shtml
Revision 1.0
For Public Release 2010 September 22 1600 UTC (GMT)
Summary
The Cisco IOS Software Network Address Translation functionality
contains three denial of service (DoS) vulnerabilities. The first
vulnerability is in the translation of Session Initiation Protocol
(SIP) packets, the second vulnerability in the translation of H.323
packets and the third vulnerability is in the translation of H.225.0
call signaling for H.323 packets.
Cisco has released free software updates that address these
vulnerabilities.
This advisory is posted at
http://www.cisco.com/warp/public/707/cisco-sa-20100922-nat.shtml
Note: The September 22, 2010, Cisco IOS Software Security Advisory
bundled publication includes six Cisco Security Advisories. Five of
the advisories address vulnerabilities in Cisco IOS Software, and one
advisory addresses vulnerabilities in Cisco Unified Communications
Manager. Each advisory lists the releases that correct the
vulnerability or vulnerabilities detailed in the advisory. The table
at the following URL lists releases that correct all Cisco IOS
Software vulnerabilities that have been published on September 22,
2010, or earlier:
http://www.cisco.com/warp/public/707/cisco-sa-20100922-bundle.shtml
Individual publication links are in "Cisco Event Response: Semiannual
Cisco IOS Software Security Advisory Bundled Publication" at the
following link:
http://www.cisco.com/web/about/security/intelligence/Cisco_ERP_sep10.html
Affected Products
Vulnerable Products
±-----------------
Cisco devices running Cisco IOS Software that are configured for NAT
and that support NAT for SIP, H.323, or H.225.0 call signaling for
H.323 packets are affected.
To verify whether NAT is enabled on a Cisco IOS device log in to the
device and issue the show ip nat statistics command. The following
example shows a device that is configured with NAT:
Router#show ip nat statistics
Total translations: 2 (0 static, 2 dynamic; 0 extended)
Outside interfaces: Serial0
Inside interfaces: Ethernet1
Hits: 135 Misses: 5
Expired translations: 2
Dynamic mappings:
-- Inside Source
access-list 1 pool mypool refcount 2
pool mypool: netmask 255.255.255.0
start 192.168.10.1 end 192.168.10.254
type generic, total addresses 14, allocated 2 (14%), misses 0
Alternatively, administrators can use the show running-config |
include ip nat command to verify if NAT has been enabled on the
router interfaces.
For NAT to be enabled in a router either the ip nat inside and ip nat
outside commands must be present in different interfaces or, in the
case of NAT Virtual Interface, if the ip nat enable interface command
is present.
In order to determine the software that runs on a Cisco IOS product,
log in to the device and issue the show version command to display
the system banner. Cisco IOS software identifies itself as
"Internetwork Operating System Software" or simply "IOS." On the next
line of output, the image name displays between parentheses, followed
by "Version" and the Cisco IOS release name. Other Cisco devices do
not have the show version command or give different output.
The following example shows output from a device that runs an IOS
image:
Router> show version
Cisco IOS Software, C3900 Software (C3900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Wed 02-Dec-09 17:17 by prod_rel_team
<More output removed for brevity>
Products Confirmed Not Vulnerable
±-------------------------------
Cisco IOS devices not explicitly configured for NAT are not
vulnerable.
Cisco IOS XE Software is not affected by these vulnerabilities.
Cisco IOS XR Software is not affected by these vulnerabilities.
No other Cisco products are currently known to be affected by these
vulnerabilities.
Details
The three vulnerabilities are triggered by transit traffic that needs
to be processed by the NAT feature. Each vulnerability is independent
of each other.
NAT for SIP DoS Vulnerability
±---------------------------
SIP is a popular signaling protocol that is used to manage voice and
video calls across IP networks such as the Internet. SIP is
responsible for handling all aspects of call setup and termination.
Voice and video are the most popular types of sessions that SIP
handles, but the protocol has the flexibility to accommodate other
applications that require call setup and termination.
NAT for SIP translates packets using UDP (port 5060) or TCP (port
5060) as the underlying transport protocol. The NAT for SIP DoS
vulnerability can be exploited only with the use of UDP port 5060
packets.
This vulnerability is documented in Cisco bug ID CSCtf17624
and has been assigned Common Vulnerabilities and Exposures (CVE)
ID CVE-2010-2831.
NAT for H.323 DoS Vulnerability
±-----------------------------
H.323 is the International Telecommunication Union (ITU) standard for
real-time multimedia communications and conferencing over
packet-based (IP) networks.
NAT for H.323 translates packets on TCP port 1720. There is a DoS
vulnerability in the NAT procession of H.323 packets. The
vulnerability does not require the completion of a TCP three-way
handshake.
This vulnerability is documented in Cisco bug ID CSCtf91428
and has been assigned Common Vulnerabilities and Exposures (CVE) IDs
CVE-2010-2832.
NAT for H.225.0 DoS vulnerability
±-------------------------------
H.323 is the ITU standard for real-time multimedia communications and
conferencing over packet-based (IP) networks. A subset of the H.323
standard is H.225.0, a standard used for call signaling protocols and
media stream packetization over IP networks.
NAT for H.225.0 translates packets on TCP port 1720. There is a DoS
vulnerability in the NAT translation of H.225.0 call signaling for
H.323 packets.
This vulnerability is documented in Cisco bug ID CSCtd86472
and has been assigned Common Vulnerabilities and Exposures (CVE) IDs
CVE-2010-2833.
Vulnerability Scoring Details
Cisco has provided scores for the vulnerabilities in this advisory
based on the Common Vulnerability Scoring System (CVSS). The CVSS
scoring in this Security Advisory is done in accordance with CVSS
version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability
severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then
compute environmental scores to assist in determining the impact of
the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding
CVSS at:
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the
environmental impact for individual networks at:
http://intellishield.cisco.com/security/alertmanager/cvss
CSCtf17624 - NAT SIP DoS Vulnerability
CVSS Base Score - 7.8
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
CVSS Temporal Score - 6.4
Exploitability Functional
Remediation Level Official Fix
Report Confidence Confirmed
CSCtf91428 - NAT for H.323 DoS
CVSS Base Score - 7.8
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
CVSS Temporal Score - 6.4
Exploitability Functional
Remediation Level Official Fix
Report Confidence Confirmed
CSCtd86472 - NAT for H.225.0 DoS
CVSS Base Score - 7.8
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
CVSS Temporal Score - 6.4
Exploitability Functional
Remediation Level Official Fix
Report Confidence Confirmed
Impact
Successful exploitation of any of the vulnerabilities described in
this document may cause the affected device to reload. Repeated
exploitation will result in an extended denial of service (DoS)
condition.
Software Versions and Fixes
When considering software upgrades, also consult
http://www.cisco.com/go/psirt and any subsequent advisories to
determine exposure and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the
devices to be upgraded contain sufficient memory and that current
hardware and software configurations will continue to be supported
properly by the new release. If the information is not clear, contact
the Cisco Technical Assistance Center (TAC) or your contracted
maintenance provider for assistance.
Each row of the following Cisco IOS Software table corresponds to a
Cisco IOS Software train. If a particular train is vulnerable, the
earliest releases that contain the fix are listed in the First Fixed
Release For This Advisory column. The First Fixed Release for All
Advisories in the September 2010 Bundle Publication column lists the
earliest possible releases that correct all the published
vulnerabilities in the Cisco IOS Software Security Advisory bundled
publication. Cisco recommends upgrading to the latest available
release, where possible.
±------------------------------------------------------------------+
| Major | Availability of Repaired Releases |
| Release | |
|------------±-----------------------------------------------------|
| Affected | | First Fixed Release for |
| 12.0-Based | First Fixed Release for | All Advisories in the |
| Releases | This Advisory | September 2010 Bundle |
| | | Publication |
|-------------------------------------------------------------------|
| There are no affected 12.0 based releases |
|---|
| Affected |
| 12.1-Based |
| Releases |
| ------------±-------------------------±-------------------------- |
| 12.1 |
| ------------±-------------------------±-------------------------- |
| 12.1AA |
| ------------±-------------------------±-------------------------- |
| 12.1AX |
| ------------±-------------------------±-------------------------- |
| 12.1AY |
| ------------±-------------------------±-------------------------- |
| 12.1AZ |
| ------------±-------------------------±-------------------------- |
| 12.1CX |
| ------------±-------------------------±-------------------------- |
| 12.1DA |
| ------------±-------------------------±-------------------------- |
| 12.1DB |
| ------------±-------------------------±-------------------------- |
| 12.1DC |
| ------------±-------------------------±-------------------------- |
| 12.1E |
| ------------±-------------------------±-------------------------- |
| 12.1EA |
| ------------±-------------------------±-------------------------- |
| 12.1EB |
| ------------±-------------------------±-------------------------- |
| 12.1EC |
| ------------±-------------------------±-------------------------- |
| 12.1EO |
| ------------±-------------------------±-------------------------- |
| 12.1EU |
| ------------±-------------------------±-------------------------- |
| 12.1EV |
| ------------±-------------------------±-------------------------- |
| 12.1EW |
| ------------±-------------------------±-------------------------- |
| 12.1EX |
| ------------±-------------------------±-------------------------- |
| 12.1EY |
| ------------±-------------------------±-------------------------- |
| 12.1EZ |
| ------------±-------------------------±-------------------------- |
| 12.1GA |
| ------------±-------------------------±-------------------------- |
| 12.1GB |
| ------------±-------------------------±-------------------------- |
| 12.1T |
| ------------±-------------------------±-------------------------- |
| 12.1XA |
| ------------±-------------------------±-------------------------- |
| 12.1XB |
| ------------±-------------------------±-------------------------- |
| 12.1XC |
| ------------±-------------------------±-------------------------- |
| 12.1XD |
| ------------±-------------------------±-------------------------- |
| 12.1XE |
| ------------±-------------------------±-------------------------- |
| 12.1XF |
| ------------±-------------------------±-------------------------- |
| 12.1XG |
| ------------±-------------------------±-------------------------- |
| 12.1XH |
| ------------±-------------------------±-------------------------- |
| 12.1XI |
| ------------±-------------------------±-------------------------- |
| 12.1XJ |
| ------------±-------------------------±-------------------------- |
| 12.1XL |
| ------------±-------------------------±-------------------------- |
| 12.1XM |
| ------------±-------------------------±-------------------------- |
| 12.1XP |
| ------------±-------------------------±-------------------------- |
| 12.1XQ |
| ------------±-------------------------±-------------------------- |
| 12.1XR |
| ------------±-------------------------±-------------------------- |
| 12.1XS |
| ------------±-------------------------±-------------------------- |
| 12.1XT |
| ------------±-------------------------±-------------------------- |
| 12.1XU |
| ------------±-------------------------±-------------------------- |
| 12.1XV |
| ------------±-------------------------±-------------------------- |
| 12.1XW |
| ------------±-------------------------±-------------------------- |
| 12.1XX |
| ------------±-------------------------±-------------------------- |
| 12.1XY |
| ------------±-------------------------±-------------------------- |
| 12.1XZ |
| ------------±-------------------------±-------------------------- |
| 12.1YA |
| ------------±-------------------------±-------------------------- |
| 12.1YB |
| ------------±-------------------------±-------------------------- |
| 12.1YC |
| ------------±-------------------------±-------------------------- |
| 12.1YD |
| ------------±-------------------------±-------------------------- |
| 12.1YE |
| ------------±-------------------------±-------------------------- |
| 12.1YF |
| ------------±-------------------------±-------------------------- |
| 12.1YH |
| ------------±-------------------------±-------------------------- |
| 12.1YI |
| ------------±-------------------------±-------------------------- |
| 12.1YJ |
| ------------±-------------------------±-------------------------- |
| Affected |
| 12.2-Based |
| Releases |
| ------------±-------------------------±-------------------------- |
| 12.2 |
| ------------±-------------------------±-------------------------- |
| 12.2B |
| ------------±-------------------------±-------------------------- |
| 12.2BC |
| ------------±-------------------------±-------------------------- |
| 12.2BW |
| ------------±-------------------------±-------------------------- |
| 12.2BX |
| ------------±-------------------------±-------------------------- |
| 12.2BY |
| ------------±-------------------------±-------------------------- |
| 12.2BZ |
| ------------±-------------------------±-------------------------- |
| 12.2CX |
| ------------±-------------------------±-------------------------- |
| 12.2CY |
| ------------±-------------------------±-------------------------- |
| 12.2CZ |
| ------------±-------------------------±-------------------------- |
| 12.2DA |
| ------------±-------------------------±-------------------------- |
| 12.2DD |
| ------------±-------------------------±-------------------------- |
| 12.2DX |
| ------------±-------------------------±-------------------------- |
| 12.2EW |
| ------------±-------------------------±-------------------------- |
| 12.2EWA |
| ------------±-------------------------±-------------------------- |
| 12.2EX |
| ------------±-------------------------±-------------------------- |
| 12.2EY |
| ------------±-------------------------±-------------------------- |
| 12.2EZ |
| ------------±-------------------------±-------------------------- |
| 12.2FX |
| ------------±-------------------------±-------------------------- |
| 12.2FY |
| ------------±-------------------------±-------------------------- |
| 12.2FZ |
| ------------±-------------------------±-------------------------- |
| 12.2IRA |
| ------------±-------------------------±-------------------------- |
| 12.2IRB |
| ------------±-------------------------±-------------------------- |
| 12.2IRC |
| ------------±-------------------------±-------------------------- |
| 12.2IRD |
| ------------±-------------------------±-------------------------- |
| 12.2IRE |
| ------------±-------------------------±-------------------------- |
| 12.2IXA |
| ------------±-------------------------±-------------------------- |
| 12.2IXB |
| ------------±-------------------------±-------------------------- |
| 12.2IXC |
| ------------±-------------------------±-------------------------- |
| 12.2IXD |
| ------------±-------------------------±-------------------------- |
| 12.2IXE |
| ------------±-------------------------±-------------------------- |
| 12.2IXF |
| ------------±-------------------------±-------------------------- |
| 12.2IXG |
| ------------±-------------------------±-------------------------- |
| 12.2IXH |
| ------------±-------------------------±-------------------------- |
| 12.2JA |
| ------------±-------------------------±-------------------------- |
| 12.2JK |
| ------------±-------------------------±-------------------------- |
| 12.2MB |
| ------------±-------------------------±-------------------------- |
| 12.2MC |
| ------------±-------------------------±-------------------------- |
| 12.2MRA |
| ------------±-------------------------±-------------------------- |
| 12.2MRB |
| ------------±-------------------------±-------------------------- |
| 12.2S |
| ------------±-------------------------±-------------------------- |
| 12.2SB |
| ------------±-------------------------±-------------------------- |
| 12.2SBC |
| ------------±-------------------------±-------------------------- |
| 12.2SCA |
| ------------±-------------------------±-------------------------- |
| 12.2SCB |
| ------------±-------------------------±-------------------------- |
| 12.2SCC |
| ------------±-------------------------±-------------------------- |
| 12.2SCD |
| ------------±-------------------------±-------------------------- |
| 12.2SE |
| ------------±-------------------------±-------------------------- |
| 12.2SEA |
| ------------±-------------------------±-------------------------- |
| 12.2SEB |
| ------------±-------------------------±-------------------------- |
| 12.2SEC |
| ------------±-------------------------±-------------------------- |
| 12.2SED |
| ------------±-------------------------±-------------------------- |
| 12.2SEE |
| ------------±-------------------------±-------------------------- |
| 12.2SEF |
| ------------±-------------------------±-------------------------- |
| 12.2SEG |
| ------------±-------------------------±-------------------------- |
| 12.2SG |
| ------------±-------------------------±-------------------------- |
| 12.2SGA |
| ------------±-------------------------±-------------------------- |
| 12.2SL |
| ------------±-------------------------±-------------------------- |
| 12.2SM |
| ------------±-------------------------±-------------------------- |
| 12.2SO |
| ------------±-------------------------±-------------------------- |
| 12.2SQ |
| ------------±-------------------------±-------------------------- |
| 12.2SRA |
| ------------±-------------------------±-------------------------- |
| 12.2SRB |
| ------------±-------------------------±-------------------------- |
| 12.2SRC |
| ------------±-------------------------±-------------------------- |
| 12.2SRD |
| ------------±-------------------------±-------------------------- |
| 12.2SRE |
| ------------±-------------------------±-------------------------- |
| 12.2STE |
| ------------±-------------------------±-------------------------- |
| 12.2SU |
| ------------±-------------------------±-------------------------- |
| 12.2SV |
| ------------±-------------------------±-------------------------- |
| 12.2SVA |
| ------------±-------------------------±-------------------------- |
| 12.2SVC |
| ------------±-------------------------±-------------------------- |
| 12.2SVD |
| ------------±-------------------------±-------------------------- |
| 12.2SVE |
| ------------±-------------------------±-------------------------- |
| 12.2SW |
| ------------±-------------------------±-------------------------- |
| 12.2SX |
| ------------±-------------------------±-------------------------- |
| 12.2SXA |
| ------------±-------------------------±-------------------------- |
| 12.2SXB |
| ------------±-------------------------±-------------------------- |
| 12.2SXD |
| ------------±-------------------------±-------------------------- |
| 12.2SXE |
| ------------±-------------------------±-------------------------- |
| 12.2SXF |
| ------------±-------------------------±-------------------------- |
| 12.2SXH |
| ------------±-------------------------±-------------------------- |
| 12.2SXI |
| ------------±-------------------------±-------------------------- |
| 12.2SY |
| ------------±-------------------------±-------------------------- |
| 12.2SZ |
| ------------±-------------------------±-------------------------- |
| 12.2T |
| ------------±-------------------------±-------------------------- |
| 12.2TPC |
| ------------±-------------------------±-------------------------- |
| 12.2XA |
| ------------±-------------------------±-------------------------- |
| 12.2XB |
| ------------±-------------------------±-------------------------- |
| 12.2XC |
| ------------±-------------------------±-------------------------- |
| 12.2XD |
| ------------±-------------------------±-------------------------- |
| 12.2XE |
| ------------±-------------------------±-------------------------- |
| 12.2XF |
| ------------±-------------------------±-------------------------- |
| 12.2XG |
| ------------±-------------------------±-------------------------- |
| 12.2XH |
| ------------±-------------------------±-------------------------- |
| 12.2XI |
| ------------±-------------------------±-------------------------- |
| 12.2XJ |
| ------------±-------------------------±-------------------------- |
| 12.2XK |
| ------------±-------------------------±-------------------------- |
| 12.2XL |
| ------------±-------------------------±-------------------------- |
| 12.2XM |
| ------------±-------------------------±-------------------------- |
| 12.2XN |
| ------------±-------------------------±-------------------------- |
| 12.2XNA |
| ------------±-------------------------±-------------------------- |
| 12.2XNB |
| ------------±-------------------------±-------------------------- |
| 12.2XNC |
| ------------±-------------------------±-------------------------- |
| 12.2XND |
| ------------±-------------------------±-------------------------- |
| 12.2XNE |
| ------------±-------------------------±-------------------------- |
| 12.2XNF |
| ------------±-------------------------±-------------------------- |
| 12.2XO |
| ------------±-------------------------±-------------------------- |
| 12.2XQ |
| ------------±-------------------------±-------------------------- |
| 12.2XR |
| ------------±-------------------------±-------------------------- |
| 12.2XS |
| ------------±-------------------------±-------------------------- |
| 12.2XT |
| ------------±-------------------------±-------------------------- |
| 12.2XU |
| ------------±-------------------------±-------------------------- |
| 12.2XV |
| ------------±-------------------------±-------------------------- |
| 12.2XW |
| ------------±-------------------------±-------------------------- |
| 12.2YA |
| ------------±-------------------------±-------------------------- |
| 12.2YB |
| ------------±-------------------------±-------------------------- |
| 12.2YC |
| ------------±-------------------------±-------------------------- |
| 12.2YD |
| ------------±-------------------------±-------------------------- |
| 12.2YE |
| ------------±-------------------------±-------------------------- |
| 12.2YF |
| ------------±-------------------------±-------------------------- |
| 12.2YG |
| ------------±-------------------------±-------------------------- |
| 12.2YH |
| ------------±-------------------------±-------------------------- |
| 12.2YJ |
| ------------±-------------------------±-------------------------- |
| 12.2YK |
| ------------±-------------------------±-------------------------- |
| 12.2YL |
| ------------±-------------------------±-------------------------- |
| 12.2YM |
| ------------±-------------------------±-------------------------- |
| 12.2YN |
| ------------±-------------------------±-------------------------- |
| 12.2YO |
| ------------±-------------------------±-------------------------- |
| 12.2YP |
| ------------±-------------------------±-------------------------- |
| 12.2YQ |
| ------------±-------------------------±-------------------------- |
| 12.2YR |
| ------------±-------------------------±-------------------------- |
| 12.2YS |
| ------------±-------------------------±-------------------------- |
| 12.2YT |
| ------------±-------------------------±-------------------------- |
| 12.2YU |
| ------------±-------------------------±-------------------------- |
| 12.2YV |
| ------------±-------------------------±-------------------------- |
| 12.2YW |
| ------------±-------------------------±-------------------------- |
| 12.2YX |
| ------------±-------------------------±-------------------------- |
| 12.2YY |
| ------------±-------------------------±-------------------------- |
| 12.2YZ |
| ------------±-------------------------±-------------------------- |
| 12.2ZA |
| ------------±-------------------------±-------------------------- |
| 12.2ZB |
| ------------±-------------------------±-------------------------- |
| 12.2ZC |
| ------------±-------------------------±-------------------------- |
| 12.2ZD |
| ------------±-------------------------±-------------------------- |
| 12.2ZE |
| ------------±-------------------------±-------------------------- |
| 12.2ZF |
| ------------±-------------------------±-------------------------- |
| 12.2ZG |
| ------------±-------------------------±-------------------------- |
| 12.2ZH |
| ------------±-------------------------±-------------------------- |
| 12.2ZJ |
| ------------±-------------------------±-------------------------- |
| 12.2ZL |
| ------------±-------------------------±-------------------------- |
| 12.2ZP |
| ------------±-------------------------±-------------------------- |
| 12.2ZU |
| ------------±-------------------------±-------------------------- |
| 12.2ZX |
| ------------±-------------------------±-------------------------- |
| 12.2ZY |
| ------------±-------------------------±-------------------------- |
| 12.2ZYA |
| ------------±-------------------------±-------------------------- |
| Affected |
| 12.3-Based |
| Releases |
| ------------±-------------------------±-------------------------- |
| 12.3 |
| ------------±-------------------------±-------------------------- |
| 12.3B |
| ------------±-------------------------±-------------------------- |
| 12.3BC |
| ------------±-------------------------±-------------------------- |
| 12.3BW |
| ------------±-------------------------±-------------------------- |
| 12.3EU |
| ------------±-------------------------±-------------------------- |
| 12.3JA |
| ------------±-------------------------±-------------------------- |
| 12.3JEA |
| ------------±-------------------------±-------------------------- |
| 12.3JEB |
| ------------±-------------------------±-------------------------- |
| 12.3JEC |
| ------------±-------------------------±-------------------------- |
| 12.3JED |
| ------------±-------------------------±-------------------------- |
| 12.3JK |
| ------------±-------------------------±-------------------------- |
| 12.3JL |
| ------------±-------------------------±-------------------------- |
| 12.3JX |
| ------------±-------------------------±-------------------------- |
| 12.3T |
| ------------±-------------------------±-------------------------- |
| 12.3TPC |
| ------------±-------------------------±-------------------------- |
| 12.3VA |
| ------------±-------------------------±-------------------------- |
| 12.3XA |
| ------------±-------------------------±-------------------------- |
| 12.3XB |
| ------------±-------------------------±-------------------------- |
| 12.3XC |
| ------------±-------------------------±-------------------------- |
| 12.3XD |
| ------------±-------------------------±-------------------------- |
| 12.3XE |
| ------------±-------------------------±-------------------------- |
| 12.3XF |
| ------------±-------------------------±-------------------------- |
| 12.3XG |
| ------------±-------------------------±-------------------------- |
| 12.3XI |
| ------------±-------------------------±-------------------------- |
| 12.3XJ |
| ------------±-------------------------±-------------------------- |
| 12.3XK |
| ------------±-------------------------±-------------------------- |
| 12.3XL |
| ------------±-------------------------±-------------------------- |
| 12.3XQ |
| ------------±-------------------------±-------------------------- |
| 12.3XR |
| ------------±-------------------------±-------------------------- |
| 12.3XS |
| ------------±-------------------------±-------------------------- |
| 12.3XU |
| ------------±-------------------------±-------------------------- |
| 12.3XW |
| ------------±-------------------------±-------------------------- |
| 12.3XX |
| ------------±-------------------------±-------------------------- |
| 12.3XY |
| ------------±-------------------------±-------------------------- |
| 12.3XZ |
| ------------±-------------------------±-------------------------- |
| 12.3YA |
| ------------±-------------------------±-------------------------- |
| 12.3YD |
| ------------±-------------------------±-------------------------- |
| 12.3YF |
| ------------±-------------------------±-------------------------- |
| 12.3YG |
| ------------±-------------------------±-------------------------- |
| 12.3YH |
| ------------±-------------------------±-------------------------- |
| 12.3YI |
| ------------±-------------------------±-------------------------- |
| 12.3YJ |
| ------------±-------------------------±-------------------------- |
| 12.3YK |
| ------------±-------------------------±-------------------------- |
| 12.3YM |
| ------------±-------------------------±-------------------------- |
| 12.3YQ |
| ------------±-------------------------±-------------------------- |
| 12.3YS |
| ------------±-------------------------±-------------------------- |
| 12.3YT |
| ------------±-------------------------±-------------------------- |
| 12.3YU |
| ------------±-------------------------±-------------------------- |
| 12.3YX |
| ------------±-------------------------±-------------------------- |
| 12.3YZ |
| ------------±-------------------------±-------------------------- |
| 12.3ZA |
| ------------±-------------------------±-------------------------- |
| Affected |
| 12.4-Based |
| Releases |
| ------------±-------------------------±-------------------------- |
| 12.4 |
| ------------±-------------------------±-------------------------- |
| 12.4GC |
| ------------±-------------------------±-------------------------- |
| 12.4JA |
| ------------±-------------------------±-------------------------- |
| 12.4JDA |
| ------------±-------------------------±-------------------------- |
| 12.4JDC |
| ------------±-------------------------±-------------------------- |
| 12.4JDD |
| ------------±-------------------------±-------------------------- |
| 12.4JHA |
| ------------±-------------------------±-------------------------- |
| 12.4JHB |
| ------------±-------------------------±-------------------------- |
| 12.4JK |
| ------------±-------------------------±-------------------------- |
| 12.4JL |
| ------------±-------------------------±-------------------------- |
| 12.4JMA |
| ------------±-------------------------±-------------------------- |
| 12.4JMB |
| ------------±-------------------------±-------------------------- |
| 12.4JX |
| ------------±-------------------------±-------------------------- |
| 12.4JY |
| ------------±-------------------------±-------------------------- |
| 12.4MD |
| ------------±-------------------------±-------------------------- |
| 12.4MDA |
| ------------±-------------------------±-------------------------- |
| 12.4MR |
| ------------±-------------------------±-------------------------- |
| 12.4MRA |
| ------------±-------------------------±-------------------------- |
| 12.4SW |
| ------------±-------------------------±-------------------------- |
| 12.4T |
| ------------±-------------------------±-------------------------- |
| 12.4XA |
| ------------±-------------------------±-------------------------- |
| 12.4XB |
| ------------±-------------------------±-------------------------- |
| 12.4XC |
| ------------±-------------------------±-------------------------- |
| 12.4XD |
| ------------±-------------------------±-------------------------- |
| 12.4XE |
| ------------±-------------------------±-------------------------- |
| 12.4XF |
| ------------±-------------------------±-------------------------- |
| 12.4XG |
| ------------±-------------------------±-------------------------- |
| 12.4XJ |
| ------------±-------------------------±-------------------------- |
| 12.4XK |
| ------------±-------------------------±-------------------------- |
| 12.4XL |
| ------------±-------------------------±-------------------------- |
| 12.4XM |
| ------------±-------------------------±-------------------------- |
| 12.4XN |
| ------------±-------------------------±-------------------------- |
| 12.4XP |
| ------------±-------------------------±-------------------------- |
| 12.4XQ |
| ------------±-------------------------±-------------------------- |
| 12.4XR |
| ------------±-------------------------±-------------------------- |
| 12.4XT |
| ------------±-------------------------±-------------------------- |
| 12.4XV |
| ------------±-------------------------±-------------------------- |
| 12.4XW |
| ------------±-------------------------±-------------------------- |
| 12.4XY |
| ------------±-------------------------±-------------------------- |
| 12.4XZ |
| ------------±-------------------------±-------------------------- |
| 12.4YA |
| ------------±-------------------------±-------------------------- |
| 12.4YB |
| ------------±-------------------------±-------------------------- |
| 12.4YD |
| ------------±-------------------------±-------------------------- |
| 12.4YE |
| ------------±-------------------------±-------------------------- |
| 12.4YG |
| ------------±-------------------------±-------------------------- |
| Affected |
| 15.0-Based |
| Releases |
| ------------±-------------------------±-------------------------- |
| 15.0M |
| ------------±-------------------------±-------------------------- |
| 15.0S |
| ------------±-------------------------±-------------------------- |
| 15.0XA |
| ------------±-------------------------±-------------------------- |
| 15.0XO |
| ------------±-------------------------±-------------------------- |
| Affected |
| 15.1-Based |
| Releases |
| ------------±-------------------------±-------------------------- |
| 15.1T |
| ------------±-------------------------±-------------------------- |
| 15.1XB |
| ±------------------------------------------------------------------+ |
Cisco IOS XE Software
±-------------------
±------------------------------------------------------------------+
| Cisco IOS | First Fixed | First Fixed Release for All |
| XE | Release for This | Advisories in the September 2010 |
| Release | Advisory | Bundle Publication |
|-----------±-----------------±-----------------------------------|
| 2.1.x | Not Vulnerable | Not Vulnerable |
|-----------±-----------------±-----------------------------------|
| 2.2.x | Not Vulnerable | Not Vulnerable |
|-----------±-----------------±-----------------------------------|
| 2.3.x | Not Vulnerable | Not Vulnerable |
|-----------±-----------------±-----------------------------------|
| 2.4.x | Not Vulnerable | Not Vulnerable |
|-----------±-----------------±-----------------------------------|
| 2.5.x | Not Vulnerable | Vulnerable; migrate to 2.6.2 or |
| | | later |
|-----------±-----------------±-----------------------------------|
| 2.6.x | Not Vulnerable | 2.6.2 |
|-----------±-----------------±-----------------------------------|
| 3.1.xS | Not Vulnerable | Not Vulnerable |
±------------------------------------------------------------------+
For mapping of Cisco IOS XE Software releases to Cisco IOS Software
releases, refer to the Cisco IOS XE 2 and Cisco IOS XE 3S Release
Notes.
Cisco IOS XR Software Table
±-------------------------
Cisco IOS XR Software is not affected by the vulnerabilities
disclosed in the September 22, 2010, Cisco IOS Software Security
Advisory bundle publication.
Workarounds
The mitigations for the NAT vulnerabilities disable the respective
Application Layer Gateway NAT processing. That is, packets will
continue to be translated at the network and transport layers, but
the embedded IP addresses will not be translated.
NAT for Session Initiation Protocol DoS Vulnerability
±---------------------------------------------------
Mitigation for this vulnerability consists of disabling NAT for SIP
over the UDP transport by using the no ip nat service udp port 5060
global configuration command.
NAT for H.323 DoS Vulnerability
±-----------------------------
Mitigation for this vulnerability consists of disabling NAT for H.323
and H.225.0 using the no ip nat service h225 global configuration
command.
NAT for H.225.0 DoS vulnerability
±-------------------------------
Mitigation for this vulnerability consists of disabling NAT for H.323
and H.225.0 using the no ip nat service h225 global configuration
command.
Obtaining Fixed Software
Cisco has released free software updates that address these
vulnerabilities. Prior to deploying software, customers should
consult their maintenance provider or check the software for feature
set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets
they have purchased. By installing, downloading, accessing or
otherwise using such software upgrades, customers agree to be bound
by the terms of Cisco's software license terms found at
http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html
or as otherwise set forth at Cisco.com Downloads at
http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact [email protected] or [email protected] for
software upgrades.
Customers with Service Contracts
±------------------------------
Customers with contracts should obtain upgraded software through
their regular update channels. For most customers, this means that
upgrades should be obtained through the Software Center on Cisco's
worldwide website at http://www.cisco.com
Customers using Third Party Support Organizations
±-----------------------------------------------
Customers whose Cisco products are provided or maintained through
prior or existing agreements with third-party support organizations,
such as Cisco Partners, authorized resellers, or service providers
should contact that support organization for guidance and assistance
with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific
customer situations, such as product mix, network topology, traffic
behavior, and organizational mission. Due to the variety of affected
products and releases, customers should consult with their service
provider or support organization to ensure any applied workaround or
fix is the most appropriate for use in the intended network before it
is deployed.
Customers without Service Contracts
±---------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco
service contract, and customers who purchase through third-party
vendors but are unsuccessful in obtaining fixed software through
their point of sale should acquire upgrades by contacting the Cisco
Technical Assistance Center (TAC). TAC contacts are as follows.
- +1 800 553 2447 (toll free from within North America)
- +1 408 526 7209 (toll call from anywhere in the world)
- e-mail: [email protected]
Customers should have their product serial number available and be
prepared to give the URL of this notice as evidence of entitlement to
a free upgrade. Free upgrades for non-contract customers must be
requested through the TAC.
Refer to
http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html
for additional TAC contact information, including localized telephone
numbers, and instructions and e-mail addresses for use in various
languages.
Exploitation and Public Announcements
The Cisco PSIRT is not aware of any public announcements or malicious
use of the vulnerabilities described in this advisory.
The NAT for SIP DoS vulnerability was found during internal testing.
The NAT for H.323 DoS and the NAT for H.225.0 DoS vulnerabilities
were found during the resolution of customer service requests.
Status of this Notice: FINAL
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY
KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE
INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS
AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS
DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that
omits the distribution URL in the following section is an
uncontrolled copy, and may lack important information or contain
factual errors.
Distribution
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20100922-nat.shtml
In addition to worldwide web posting, a text version of this notice
is clear-signed with the Cisco PSIRT PGP key and is posted to the
following e-mail and Usenet news recipients.
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
Future updates of this advisory, if any, will be placed on Cisco's
worldwide website, but may or may not be actively announced on
mailing lists or newsgroups. Users concerned about this problem are
encouraged to check the above URL for any updates.
Revision History
±--------------------------------------+
| Revision | | Initial |
| 1.0 | 2010-Sep-22 | public |
| | | release. |
±--------------------------------------+
Cisco Security Procedures
Complete information on reporting security vulnerabilities in Cisco
products, obtaining assistance with security incidents, and
registering to receive security information from Cisco, is available
on Cisco's worldwide website at
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
This includes instructions for press inquiries regarding Cisco
security notices. All Cisco security advisories are available at
http://www.cisco.com/go/psirt
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