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CVE-2011-2764: Ioquake3 Engine: Remote code execution

CVE-2011-2764 has a CVSS v2 base score of 10.0 (the maximum on that scale) and affects Ioquake3 Engine. 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

The FS_CheckFilenameIsNotExecutable function in qcommon/files.c in the ioQuake3 engine 1.36 and earlier, as used in World of Padman, Smokin' Guns, OpenArena, Tremulous, and ioUrbanTerror, does not properly determine dangerous file extensions, which allows remote attackers to execute arbitrary code via a crafted third-party addon that creates a Trojan horse DLL file.

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

Ioquake3 Engine: up to and including 1.36; 1.36 rc1
Openarena: all versions listed by NVD
Smokin' Guns: all versions listed by NVD
Tremulous: all versions listed by NVD
Iourbanterror: all versions listed by NVD
World Of Padman: all versions listed by NVD