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Vulnerability of CA Anti-Virus: bypassing arclib

Synthesis of the vulnerability 

An attacker can create a malformed archive containing a virus which is not detected by the antivirus.
Vulnerable systems: CA Antivirus, e-Trust Antivirus.
Severity of this threat: 2/4.
Creation date: 27/01/2009.
Références of this weakness: BID-33464, CA20090126-01, CERTA-2009-AVI-033, CVE-2009-0042, VIGILANCE-VUL-8426.

Description of the vulnerability 

The arclib.dll/arclib.so library extracts files contained in an archive.

When the archive is malformed, arclib fails to extract files, and the antivirus concludes that this archive does not contain a virus.

An attacker can therefore create a malformed archive containing a virus which is not detected by the antivirus.
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This cybersecurity threat impacts software or systems such as CA Antivirus, e-Trust Antivirus.

Our Vigil@nce team determined that the severity of this computer threat note is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this security threat.

Solutions for this threat 

CA Anti-Virus: arclib version 7.3.0.15.
Arclib version 7.3.0.15 is corrected. It was distributed on September 2008.
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