[CORE-2014-0008] - Advantech AdamView Buffer Overflow

Core Security - Corelabs Advisory
http://corelabs.coresecurity.com/

Advantech AdamView Buffer Overflow

1. Advisory Information

Title: Advantech AdamView Buffer Overflow
Advisory ID: CORE-2014-0008
Advisory URL:
http://www.coresecurity.com/advisories/advantech-adamView-buffer-overflow
Date published: 2014-11-19
Date of last update: 2014-11-19
Vendors contacted: Advantech
Release mode: User release

2. Vulnerability Information

Class: Buffer overflow [CWE-119]
Impact: Code execution
Remotely Exploitable: No
Locally Exploitable: Yes
CVE Name: CVE-2014-8386

3. Vulnerability Description

   Advantech AdamView [1] is a HMI Software for Data Acquisition
   software package for human-machine interfaces HMI, and supervisory
   control and data acquisition SCADA.

   Advantech AdamView has to two different fields vulnerable to buffer
   overflow attacks, which can be exploited by attackers in order to
   execute arbitrary code by running files with the '.gni' extension that
   is assosiated with the AdamView software.

4. Vulnerable packages

   . Advantech AdamView V4.3
   . Other versions are probably affected too, but they were not checked.

5. Vendor Information, Solutions and Workarounds

   The vendor informed us that the product is no longer supported and
   therefore no fix or update is going to be released.

   Given that this is a client-side vulnerability, affected users
   should avoid opening untrusted '.gni' files. Core Security also
   recommends those affected use third party software such as Sentinel [3]
   or EMET [2] that could help to prevent the exploitation of affected
   systems to some extent.

6. Credits

   This vulnerability was discovered and researched by Daniel Kazimirow
   and Fernando Paez from Core Security Exploit Writers Team. The
   publication of this advisory was coordinated by Joaquin Rodriguez Varela
   from Core Advisories Team.

7. Technical Description / Proof of Concept Code

   This vulnerability is caused by a stack buffer overflow when parsing
   the display properties parameter. A malicious third party could trigger
   execution of arbitrary code within the context of the application, or
   otherwise crash the whole application.

   Below are shown the vulnerable fields, the debug information, and
   the stack state after being overwritten.

/-----

VULNERABLE FIELDS:

[+] display properties (BUG 1)
00475BA0 |. 53 PUSH EBX ; /<%s>
00475BA1 |. 8D4C24 18 LEA ECX,DWORD PTR SS:[ESP+18] ; |
00475BA5 |. 68 F09C4B00 PUSH ADAMView.004B9CF0 ;
|Format = "Display Designer: %s"
00475BAA |. 51 PUSH ECX ; |s
00475BAB |. 8BF0 MOV ESI,EAX ; |
00475BAD |. FF15 84FF4900 CALL DWORD PTR DS:[<&USER32.wsprintfA>] ;
\wsprintfA

DEBUG:

EAX 00000000
ECX 00000001
EDX 00000000
EBX 00000003
ESP 0012F924
EBP 00000000
ESI 0012F9B4
EDI 00F39DC8
EIP CCCCCCCC <------------------------------------
C 0 ES 0023 32bit 0(FFFFFFFF)
P 0 CS 001B 32bit 0(FFFFFFFF)
A 0 SS 0023 32bit 0(FFFFFFFF)
Z 0 DS 0023 32bit 0(FFFFFFFF)
S 0 FS 003B 32bit 7FFDE000(FFF)
T 0 GS 0000 NULL
D 0
O 0 LastErr ERROR_SUCCESS (00000000)
EFL 00010202 (NO,NB,NE,A,NS,PO,GE,G)
ST0 empty
ST1 empty
ST2 empty
ST3 empty
ST4 empty
ST5 empty
ST6 empty
ST7 empty
3 2 1 0 E S P U O Z D I
FST 4000 Cond 1 0 0 0 Err 0 0 0 0 0 0 0 0 (EQ)
FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1

STACK:

0012F958 CCCCCCCC IIII
0012F95C CCCCCCCC IIII
0012F960 CCCCCCCC IIII
0012F964 CCCCCCCC IIII
0012F968 CCCCCCCC IIII
0012F96C CCCCCCCC IIII
0012F970 CCCCCCCC IIII
0012F974 CCCCCCCC IIII
0012F978 CCCCCCCC IIII
0012F97C CCCCCCCC IIII Pointer to next SEH record
0012F980 0043304A J0C. SE handler <-------------- SEH CONTROLLED
BY US (PPR)
0012F984 FFFFFFFF yyyy
0012F988 00485103 QH. RETURN to ADAMView.00485103

-----/

This vulnerability is caused by a stack buffer overflow when parsing

the conditional bitmap parameter. A malicious third party could trigger
execution of arbitrary code within the context of the application, or
otherwise crash the whole application.

Below are shown the vulnerable fields, the debug information, and

the stack state after being overwritten.

/-----

VULNERABLE FIELDS:

[+] conditional bitmap > bitmap file map (is a path) (BUG 2)

00406E70 |. 55 |PUSH EBP ;
/StringToAdd
00406E71 |. 51 |PUSH ECX ;
|ConcatString
00406E72 |. FF15 A8F34900 |CALL DWORD PTR DS:[<&KERNEL32.lstrcatA>>;
\lstrcatA

DEBUG:

EAX 00000000
ECX CCCCCCCC <--------------------- EAX
EDX 73EA2608 MFC42.73EA2608
EBX 00F3C92E ASCII "BMP1"
ESP 0012F884
EBP 0000099C
ESI 0012F9B4
EDI 00F3C818
EIP CCCCCCCC <---------------------
C 0 ES 0023 32bit 0(FFFFFFFF)
P 0 CS 001B 32bit 0(FFFFFFFF)
A 0 SS 0023 32bit 0(FFFFFFFF)
Z 0 DS 0023 32bit 0(FFFFFFFF)
S 0 FS 003B 32bit 7FFDF000(FFF)
T 0 GS 0000 NULL
D 0
O 0 LastErr ERROR_PATH_NOT_FOUND (00000003)
EFL 00010202 (NO,NB,NE,A,NS,PO,GE,G)
ST0 empty
ST1 empty
ST2 empty
ST3 empty
ST4 empty
ST5 empty
ST6 empty
ST7 empty
3 2 1 0 E S P U O Z D I
FST 4000 Cond 1 0 0 0 Err 0 0 0 0 0 0 0 0 (EQ)
FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1

STACK:

0012F884 CCCCCCCC
0012F888 CCCCCCCC
0012F88C CCCCCCCC
0012F890 CCCCCCCC
0012F894 CCCCCCCC
0012F898 CCCCCCCC
0012F89C CCCCCCCC
0012F8A0 7ACCCCCC
0012F8A4 CC004342
0012F8A8 CCCCCCCC
0012F8AC CCCCCCCC
0012F8B0 CCCCCCCC
0012F8B4 CCCCCCCC
0012F8B8 CCCCCCCC
0012F8BC CCCCCCCC
0012F8C0 CCCCCCCC
0012F8C4 CCCCCCCC

-----/

8. Report Timeline
   . 2014-10-01:

   Initial notification sent to ICS-CERT informing of the vulnerability
   and requesting the vendor's contact information.

. 2014-10-01:

ICS-CERT informs that they will ask the vendor if they want to

coordinate directly with us or if they prefer to have ICS-CERT mediate.
They request the vulnerability report.

. 2014-10-01:

ICS-CERT informs that the vendor answered that they would like the

ICS-CERT to mediate the coordination of the advisory. They requested
again the vulnerability report.

. 2014-10-01:

We send the vulnerability detail, including technical description

and a PoC.

. 2014-10-09:

We request a status update on the reported vulnerability.

. 2014-10-20:

ICS-CERT informs that the vendor is still reviewing the vulnerability.

. 2014-10-27:

ICS-CERT informs us that the vendor is no longer supporting

ADAMView, and therefore they will not fix it.

. 2014-11-13:

We inform them that we will publish this advisory as user release on

Wednesday 19th of November.

. 2014-11-19:

Advisory CORE-2014-0008 published.

9. References

[1]
http://www.advantech.com/products/1-39JG4I/ADAMVIEW/mod_328DB466-4B81-4652-B8AF-F5568F24A103.aspx.
[2] http://support.microsoft.com/kb/2458544.
[3] https://github.com/CoreSecurity/sentinel.

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12. Disclaimer

    The contents of this advisory are copyright (c) 2014 Core Security
    and (c) 2014 CoreLabs, and are licensed under a Creative Commons
    Attribution Non-Commercial Share-Alike 3.0 (United States) License:
    http://creativecommons.org/licenses/by-nc-sa/3.0/us/

13. PGP/GPG Keys

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    advisories team, which is available for download at
    http://www.coresecurity.com/files/attachments/core_security_advisories.asc.