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Opera Web Browser 12.11 WriteAV Vulnerability

Disclosed December 3, 2012    Fully Patched

Vulnerability Description:

Opera 12.11 and earlier 12.12 versions mishandle GIF images. The mishandling of GIF images leads to memory corruption via a write access violation. This bug is most likely exploitable; however, no exploits have yet been developed for this issue.


Opera Software

Vulnerable Software/Devices:

12.11 Build 1661 and versions earlier than 12.12 Build 1707

Vulnerability Severity:


Exploit Availability:


Exploit Impact:

Remote Code Execution
Remote Code Execution Exploitation of this vulnerability is possible through the use of methods like drive-by attacks. Remote attackers who successfully exploit this vulnerability will be able to execute code on the vulnerable system with the same rights as the currently logged on user.

BeyondTrust Prevention and Detection:

BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.

  • 17741 - Opera GIF Parsing Vulnerability - Windows
  • 17742 - Opera GIF Parsing Vulnerability - Windows x64
  • 17743 - Opera GIF Parsing Vulnerability - Mac OS X
  • 17744 - Opera GIF Parsing Vulnerability - UNIX/Linux


 No mitigations are currently available.