Red Hat Bugzilla – Bug 863620
CVE-2012-3989 Mozilla: Crash with invalid cast when using instanceof operator (MFSA 2012-80)
Last modified: 2012-10-09 14:04:31 EDT
In general these flaws cannot be exploited through email in the Thunderbird and SeaMonkey products because scripting is disabled, but are potentially a risk in browser or browser-like contexts in those products.
Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Ms2ger as the original reporter.
Not Vulnerable. This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5 and 6.