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Category:   Application (Generic)  >   imlib2 Vendors:   [Multiple Authors/Vendors]
imlib2 Stack Overflow in Processing PNM and XPM Images Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1020146
SecurityTracker URL:  http://securitytracker.com/id/1020146
CVE Reference:   CVE-2008-2426   (Links to External Site)
Date:  May 29 2008
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 1.4.0; possibly other versions
Description:   A vulnerability was reported in imlib2. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create a specially crafted PNM or XPM image file that, when processed by the target application that uses imlib2, will trigger a stack overflow and execute arbitrary code on the target system. The code will run with the privileges of the target application.

The vulnerability resides in the load() function in 'src/modules/loaders/loader_pnm.c' and the load() function in 'src/modules/loader_xpm.c'.

The vendor was notified on May 27, 2008.

Stefan Cornelius of Secunia Research reported this vulnerability.

Impact:   A remote user can create a file that, when processed by the target application, will execute arbitrary code on the target system.
Solution:   The vendor has issued a fix, available at:

http://sourceforge.net/project/showfiles.php?group_id=2

Vendor URL:  sourceforge.net/project/showfiles.php?group_id=2 (Links to External Site)
Cause:   Boundary error
Underlying OS:   Linux (Any), UNIX (Any)

Message History:   None.


 Source Message Contents

Date:  Thu, 29 May 2008 13:16:44 +0200
Subject:  [Full-disclosure] Secunia Research: imlib2 PNM and XPM Buffer

====================================================================== 

                     Secunia Research 29/05/2008

               - imlib2 PNM and XPM Buffer Overflows -

====================================================================== 
Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

====================================================================== 
1) Affected Software 

* imlib2 1.4.0

NOTE: Other versions may also be affected.

====================================================================== 
2) Severity 

Rating: Highly critical
Impact: System access
Where:  Remote

====================================================================== 
3) Vendor's Description of Software 

"Imlib 2 is the successor to Imlib. It is NOT a newer version -- it
is a completely new library. Imlib 2 can be installed alongside
Imlib 1.x without any problems since they are effectively different
libraries which have very similar functionality."

Product Link:
http://enlightenment.org

====================================================================== 
4) Description of Vulnerability

Secunia Research has discovered two vulnerabilities in imlib2, which
can be exploited by malicious people to cause a DoS (Denial of
Service) or compromise an application using the library.

1) A boundary error exists within the "load()" function in
src/modules/loaders/loader_pnm.c when processing the header of a
PNM image file. This can be exploited to cause a stack-based buffer
overflow by e.g. tricking a user into opening a specially crafted
PNM image in an application using the imlib2 library.

Successful exploitation allows execution of arbitrary code.

2) A boundary error exists within the "load()" function in
src/modules/loader_xpm.c when processing an XPM image file. This can
be exploited to cause a stack-based buffer overflow by e.g. tricking
a user into opening a specially crafted XPM image with an application
using the imlib2 library.

Successful exploitation may allow execution of arbitrary code.

====================================================================== 
5) Solution 

Fixed in the CVS repository.

====================================================================== 
6) Time Table 

27/05/2008 - Vendor notified.
27/05/2008 - Vendor response.
29/05/2008 - Public disclosure.

====================================================================== 
7) Credits 

Discovered by Stefan Cornelius, Secunia Research.

====================================================================== 
8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2008-2426 for these vulnerabilities.

====================================================================== 
9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://corporate.secunia.com/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private 
individuals, who are interested in or concerned about IT-security.

http://secunia.com/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the 
security and reliability of software in general:

http://corporate.secunia.com/secunia_research/33/

Secunia regularly hires new skilled team members. Check the URL below 
to see currently vacant positions:

http://secunia.com/secunia_vacancies/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/secunia_security_advisories/ 

====================================================================== 
10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2008-25/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

======================================================================

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

 
 


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