CVE-2009-0773

Severity: critical (CVSS 10.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-03-05 · updated 2026-06-16
Weakness: CWE-399

Description

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.

Affected products

Mozilla Firefox: through 3.0.6; 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5 (+43)
Mozilla Seamonkey: through 1.1.14; 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.5, 1.0.6 (+19)
Mozilla Thunderbird: through 2.0.0.20; 2.0.0.0, 2.0.0.4, 2.0.0.5, 2.0.0.6, 2.0.0.9, 2.0.0.12 (+5)

References

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