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SYNTHESIS OF THE VULNERABILITY

An attacker can create an archive or a program containing a virus,
which is not detected by eTrust Antivirus.

Severity: 2/4

Creation date: 21/03/2012

IMPACTED PRODUCTS

– eTrust Antivirus

DESCRIPTION OF THE VULNERABILITY

Tools extracting archives (CAB.) accept to extract archives which
are slightly malformed. Systems also accept to execute programs
(ELF) which are slightly malformed. However, eTrust Antivirus does
not detect viruses contained in these archives/programs.

An ELF program containing a large "identsize" field bypasses the
detection. [severity:2/4; BID-52595, CVE-2012-1440]

An ELF program containing a large "encoding" field bypasses the
detection. [severity:2/4; BID-52600, CVE-2012-1446]

A CAB archive containing a large "coffFiles" field bypasses the
detection. [severity:1/4; BID-52621, CVE-2012-1453]

An attacker can therefore create an archive containing a virus
which is not detected by the antivirus, but which is extracted by
extraction tools. The virus is then detected once it has been
extracted on victim’s computer. An attacker can also create a
program, containing a virus which is not detected by the
antivirus, but which can be run by the system.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/eTrust-Antivirus-bypassing-via-CAB-ELF-11478