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KDE Okular PDB Parsing RLE Decompression Buffer Overflow

KDE Okular PDB Parsing RLE Decompression Buffer Overflow
Posted Aug 26, 2010
Authored by Stefan Cornelius | Site secunia.com

Secunia Research has discovered a vulnerability in KDE Okular, which can be exploited by malicious people to potentially compromise a user's system. The vulnerability is caused by a boundary error within the RLE decompression in the "TranscribePalmImageToJPEG()" function in generators/plucker/unpluck/image.cpp. This can be exploited to cause a heap-based buffer overflow by e.g. tricking a user into opening a specially crafted PDB file. Version 4.4.5 is affected.

tags | advisory, overflow
advisories | CVE-2010-2575
SHA-256 | 8c7614ed1d10fc84857b0b29006d609762118b6119da09eab610cc7c6558b0de

KDE Okular PDB Parsing RLE Decompression Buffer Overflow

Change Mirror Download
====================================================================== 

Secunia Research 25/08/2010

- KDE Okular PDB Parsing RLE Decompression Buffer Overflow -

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

* KDE Okular 4.4.5

NOTE: Other versions may also be affected.

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

Rating: Moderately critical
Impact: System access
Where: Remote

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

"Okular is a universal document viewer based on KPDF for KDE 4.".

Product Link:
http://okular.kde.org/

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

Secunia Research has discovered a vulnerability in KDE Okular, which
can be exploited by malicious people to potentially compromise a
user's system.

The vulnerability is caused by a boundary error within the RLE
decompression in the "TranscribePalmImageToJPEG()" function in
generators/plucker/unpluck/image.cpp. This can be exploited to cause
a heap-based buffer overflow by e.g. tricking a user into opening a
specially crafted PDB file.

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

Apply patches. See the vendor's advisory for additional details.
http://www.kde.org/info/security/advisory-20100825-1.txt

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

11/08/2010 - Vendor notified.
11/08/2010 - Vendor response.
25/08/2010 - Public disclosure.

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

Discovered by Stefan Cornelius, Secunia Research.

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

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2010-2575 for the vulnerability.

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

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

http://secunia.com/advisories/business_solutions/

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/advisories/

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://secunia.com/secunia_research/

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

http://secunia.com/corporate/jobs/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/advisories/mailing_lists/

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

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2010-109/

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

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