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 Joaquín Rodríguez 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  ÌÌÌÌ
0012F95C   CCCCCCCC  ÌÌÌÌ
0012F960   CCCCCCCC  ÌÌÌÌ
0012F964   CCCCCCCC  ÌÌÌÌ
0012F968   CCCCCCCC  ÌÌÌÌ
0012F96C   CCCCCCCC  ÌÌÌÌ
0012F970   CCCCCCCC  ÌÌÌÌ
0012F974   CCCCCCCC  ÌÌÌÌ
0012F978   CCCCCCCC  ÌÌÌÌ
0012F97C   CCCCCCCC  ÌÌÌÌ  Pointer to next SEH record
0012F980   0043304A  J0C.  SE handler   <-------------- SEH CONTROLLED BY US (PPR)
0012F984   FFFFFFFF  ÿÿÿÿ
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.

10. About CoreLabs

CoreLabs, the research center of Core Security, is charged with anticipating the future needs and requirements for information security technologies. We conduct our research in several important areas of computer security including system vulnerabilities, cyber attack planning and simulation, source code auditing, and cryptography. Our results include problem formalization, identification of vulnerabilities, novel solutions and prototypes for new technologies. CoreLabs regularly publishes security advisories, technical papers, project information and shared software tools for public use at: http://corelabs.coresecurity.com.

11. About Core Security

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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

This advisory has been signed with the GPG key of Core Security advisories team, which is available for download at http://www.coresecurity.com/files/attachments/core_security_advisories.asc.