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CVE-2008-5014: Mozilla Firefox: Remote code execution

CVE-2008-5014 has a CVSS v2 base score of 10.0 (the maximum on that scale) and affects Mozilla Firefox, along with 2 other products in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

jslock.cpp in Mozilla Firefox 3.x before 3.0.2, Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by modifying the window.__proto__.__proto__ object in a way that causes a lock on a non-native object, which triggers an assertion failure related to the OBJ_IS_NATIVE function.

Severity breakdown

CVSS v2.0 10.0: AV:N/AC:L/Au:N/C:C/I:C/A:C

Access vector: Network. Exploitable remotely over the network.
Access complexity: Low. No special conditions are required.
Authentication: None. No authentication is needed.
Confidentiality impact: Complete. Total information disclosure.
Integrity impact: Complete. Total loss of integrity.
Availability impact: Complete. Total shutdown of the component.

Underlying weakness

CWE-20: Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Affected products

Mozilla Firefox: from 2.0 before 2.0.0.18; from 3.0 before 3.0.2
Mozilla Seamonkey: from 1.0 before 1.1.13
Mozilla Thunderbird: from 2.0 before 2.0.0.18
Debian Linux: 4.0
Canonical Ubuntu Linux: 6.06; 7.10; 8.04; 8.10