CVE 2011-0062
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox 3.6.x before 3.6.14 and Thunderbird 3.1.x before 3.1.8 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.
See the 
CVE page on Mitre.org
for more details.
