J-Security Center

Title: Mozilla Firefox 3.5 'TraceMonkey' Component Remote Code Execution Vulnerability

Severity: HIGH

Description:

Mozilla Firefox is a web browser available for various platforms.

Firefox is prone to a remote code-execution vulnerability. The problem occurs in the 'TraceMonkey' component. The issue presents itself in the 'LeaveTree' function of the 'jstracer.cpp' file. Specifically, the issue occurs because in certain scenarios the function incorrectly restores values returned by native functions calls when 'deep bail' conditions arise.

Successful exploits may allow an attacker to execute arbitrary code in the context of the user running the affected application. Failed attempts will likely result in denial-of-service conditions.

The issue affects Firefox 3.5; other versions may also be vulnerable.

NOTE: Remote code execution was confirmed in Firefox 3.5 running on Microsoft Windows XP SP2. A crash was observed in Firefox 3.5 on Windows XP SP3.

UPDATE (July 15, 2009): Remote code execution is also possible in Firefox 3.5 running on Apple Mac OS X.

Affected Products:

  • Mozilla Firefox 3.5.0
  • Mozilla XULRunner 1.9
  • Mozilla XULRunner 1.9.1
  • Mozilla XULRunner 1.9.1.1
  • RedHat Fedora 11
  • Sun OpenSolaris build snv_119
  • Sun OpenSolaris build snv_120
  • Sun OpenSolaris build snv_121

References:

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