CVE-2009-0773

The JavaScript engine in Mozilla Firefox before 3.0.7, Thunderbird before
2.0.0.21, and SeaMonkey 1.1.15 allows remote attackers to cause a denial of
service (crash) and possibly execute arbitrary code via (1) a splice of an
array that contains “some non-set elements,” which causes jsarray.cpp to
pass an incorrect argument to the ResizeSlots function, which triggers
memory corruption; (2) vectors related to js_DecompileValueGenerator,
jsopcode.cpp, defineSetter, and watch, which triggers an assertion
failure or a segmentation fault; and (3) vectors related to gczeal,
defineSetter, and watch, which triggers a hang.