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SYNTHESIS OF THE VULNERABILITY

An attacker can create a RAR or ZIP archive containing a virus
which is not detected by F-Secure products.

Severity: 2/4

Consequences: data flow

Provenance: document

Means of attack: no proof of concept, no attack

Ability of attacker: expert (4/4)

Confidence: confirmed by the editor (5/5)

Diffusion of the vulnerable configuration: high (3/3)

Creation date: 07/05/2009

IMPACTED PRODUCTS

– F-Secure Anti-Virus

DESCRIPTION OF THE VULNERABILITY

F-Secure products detect viruses contained in RAR and ZIP archives.

However, an attacker can create a slightly malformed archive,
which can still be opened by Unrar/Unzip tools, but which cannot
be opened by the antivirus.

Technical details are unknown.

An attacker can therefore create a RAR or ZIP archive containing a
virus which is not detected by F-Secure.

CHARACTERISTICS

Identifiers: BID-34849, FSC-2009-1, VIGILANCE-VUL-8697

http://vigilance.fr/vulnerability/F-Secure-AV-bypassing-via-RAR-and-ZIP-8697