TELUS Security Labs VR - Symantec Antivirus Intel Alert Handler Service Denial of Service

Symantec Antivirus Intel Alert Handler Service Denial of Service

TSL ID: FSC20101213-06

1. Affected Software

   Symantec Antivirus Corporate Edition 10.1.8.8000 and possibly prior
   Symantec System Center 10.1.8.8000 and possibly prior

Reference: http://www.symantec.com/business/antivirus-corporate-edition

2. Vulnerability Summary

A denial of service vulnerability exists in Symantec Antivirus Intel Alert Handler service. Remote unauthenticated attackers can exploit this vulnerability by
sending a malicious packet to the target service.

3. Vulnerability Analysis

The Alert Management System (AMS) component of Symantec Antivirus Corporate Edition installs an alert handler service, HNDLRSVC, that listens for commands from
the AMS server. This service does not perform proper input validation of the command arguments while parsing parameters in the AMSGetPastParamList function.
Remote unauthenticated attackers could exploit this vulnerability by sending a crafted packet, with overly long parameter size values, via the MSGSYS.EXE service
on port 38292/TCP.

4. Vulnerability Detection

TELUS Security Labs has confirmed the vulnerability in:

 Symantec Antivirus Corporate Edition 10.1.8.8000
 Symantec System Center 10.1.8.8000

5. Workaround

Disable the AMS service, or update to the non-vulnerable version of Symantec Antivirus 11.x series which does not include the vulnerable AMS component.

6. Vendor Response

Patches have been made available by the vendor to eliminate this vulnerability:

http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2011&suid=20110126_01

7. Disclosure Timeline

2009-10-01 Reported to the vendor
2009-10-20 Vendor response
2011-01-26 Coordinated public disclosure

8. Credits

Junaid Bohio of Vulnerability Research Team, TELUS Security Labs

9. References

CVE: CVE-2010-0111

Vendor: http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2011&suid=20110126_01

http://telussecuritylabs.com/threats/show/FSC20101213-06

10. About TELUS Security Labs

TELUS Security Labs, formerly Assurent Secure Technologies is the leading provider of security research. Our research services include:

* Vulnerability Research
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* Signature Development
* Shellcode Exploit Development
* Application Protocols
* Product Security Testing
* Security Content Development (parsers, reports, alerts)

TELUS Security Labs provides a specialized portfolio of services to assist security product vendors with newly discovered commercial product vulnerabilities and
malware attacks. Many of our services are provided on a subscription basis to reduce research costs for our customers. Over 50 of the world's leading security
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