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XnView JLS File Decompression Heap Overflow

Summary

XnView Formats PlugIn is prone to an overflow condition. The JLS Plugin (xjpegls.dll) library fails to properly sanitize user-supplied input resulting in a heap-based buffer overflow. With a specially crafted JLS compressed image file, a context-dependent attacker could potentially execute arbitrary code.

POC file posted at: http://www.reactionpenetrationtesting.co.uk/vuln.jls

  • CVE number: CVE-2012-4988
  • Impact: High
  • Vendor homepage: http://www.xnview.com/
  • Vendor notified: 29/06/2012
  • Vendor response: Fix was promised for 1.99.1 but no fix was released
  • Found by: Joseph Sheridan, Director of Reaction Information Security

About ReactionIS

Reaction Information Security is a leading independent pen test consultancy specialising in delivering the highest quality services including network pen testing and web application security testing. As a CESG CHECK Service Provider we are authorised to carry out penetration testing on classified government networks.

Affected Products

XnView 1.99 and 1.99.1, 'All Plugins 1.90' and Xjpegls.dll (version 1.96.0.0) previous versions may also be affected.

Details

XnView Formats PlugIn is prone to an overflow condition. The JLS Plugin (xjpegls.dll) library fails to properly sanitize user-supplied input resulting in a heap-based buffer overflow. With a specially crafted JLS compressed image file, a context-dependent attacker could potentially execute arbitrary code.

Impact

If a user could be enticed to open a malicious JLS file, the attack could result in remote code execution.

Solution

No solution at the time of writing. Never open files from untrusted sources.

Distribution

In addition to posting on the website, a text version of this notice has been posted to the following e-mail and Usenet news recipients.

  • bugtraq () securityfocus com
  • full-disclosure () lists grok org uk

Future updates of this advisory, if any, will be reflected on this page, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the current page for any updates.

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