====================================================================== 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/ ======================================================================