Mozilla Base64 decoding crash

Multiple integer overflows in the 1 PLBase64Decode and 2 PLBase64Encode functions in nsprpub/lib/libc/src/base64.c in Mozilla Firefox before 3.0.12, Thunderbird before 2.0.0.24, and SeaMonkey before 1.1.19 allow remote attackers to cause a denial of service memory corruption and application crash...