====================================================================== Secunia Research 09/04/2009 - Ghostscript jbig2dec JBIG2 Processing 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 * Ghostscript version 8.64 NOTE: Other versions may also be affected. ====================================================================== 2) Severity Rating: Highly critical Impact: System access Where: Remote ====================================================================== 3) Vendor's Description of Software "An interpreter for the PostScript (TM) language, with the ability to convert PostScript language files to many raster formats, view them on displays, and print them on printers that don't have PostScript language capability built in; An interpreter for Portable Document Format (PDF) files, with the same abilities; ..." Product Link: http://www.ghostscript.com/Ghostscript.html ====================================================================== 4) Description of Vulnerability Secunia Research has discovered a vulnerability in Ghostscript, which can be exploited by malicious people to potentially compromise a user's system. The vulnerability is caused due to a boundary error in the included jbig2dec library while decoding JBIG2 symbol dictionary segments. This can be exploited to cause a heap-based buffer overflow via a specially crafted PDF file. Successful exploitation may allow execution of arbitrary code. ====================================================================== 5) Solution Do not process untrusted PDF files. ====================================================================== 6) Time Table 26/03/2009 - Vendor notified. 26/03/2009 - vendor-sec notified. 02/04/2009 - Vendor response. 09/04/2009 - Public disclosure. ====================================================================== 7) Credits Discovered by Alin Rad Pop, Secunia Research. ====================================================================== 8) References The Common Vulnerabilities and Exposures (CVE) project has assigned CVE-2009-0196 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/2009-21/ Complete list of vulnerability reports published by Secunia Research: http://secunia.com/secunia_research/ ======================================================================