Mozilla Foundation Security Advisory 2009-65

Crashes with evidence of memory corruption (rv:1.9.1.6/ 1.9.0.16)

Announced

December 15, 2009

Reporter

Mozilla developers and community

Impact

Critical

Products

Firefox, SeaMonkey, Thunderbird

Fixed in

• Firefox 3.0.16
• Firefox 3.5.6
• SeaMonkey 2.0.1
• Thunderbird 3.0.1

Description

Mozilla developers and community members identified and fixed several stability bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these crashes showed evidence of memory corruption under certain circumstances and we presume that with enough effort at least some of these could be exploited to run arbitrary code.

Workaround

Disable JavaScript until a version containing these fixes can be installed.

References

Jesse Ruderman, Josh Soref, Martijn Wargers, Jose Angel, and Olli Pettay reported crashes in the browser engine which affected both Firefox 3 and Firefox 3.5.

• Browser engine crashes - Firefox 3, Firefox 3.5
• CVE-2009-3979

Jeremy Lea and Jesse Ruderman reported crashes in the browser engine which only affected Firefox 3.5.

• Browser engine crashes - Firefox 3.5
• CVE-2009-3980

Jesse Ruderman also reported a crash in the browser engine which only affected Firefox 3.

• Browser engine crash - Firefox 3
• CVE-2009-3981

David Mandelin, Gary Kwong, Jason Orendorff and Igor Bukanov reported crashes in the JavaScript engine which only affected Firefox 3.5.

• JavaScript engine crashes - Firefox 3.5
• CVE-2009-3982