Mandriva Linux Security Advisory 2011-139 - Security issues were identified and fixed in Mozilla Firefox and Thunderbird. Mozilla Firefox before 3.6.23 and 4.x through 6, Thunderbird before 7.0, and SeaMonkey before 2.4 do not prevent the starting of a download in response to the holding of the Enter key, which allows user-assisted remote attackers to bypass intended access restrictions via a crafted web site. Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 3.6.23 and 4.x through 6, Thunderbird before 7.0, and SeaMonkey before 2.4 allow remote attackers to cause a denial of service or possibly execute arbitrary code via unknown vectors. Unspecified vulnerability in the plugin API in Mozilla Firefox 3.6.x before 3.6.23 allows remote attackers to cause a denial of service or possibly execute arbitrary code via unknown vectors. Integer underflow in Mozilla Firefox 3.6.x before 3.6.23 allows remote attackers to cause a denial of service or possibly execute arbitrary code via JavaScript code containing a large RegExp expression. Various other issues were also addressed.
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