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security announce CVE-2009-1782

F-Secure AV: bypassing via RAR and ZIP

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 of this bulletin: 2/4.
Creation date: 07/05/2009.
Références of this threat: BID-34849, CVE-2009-1782, FSC-2009-1, VIGILANCE-VUL-8697.
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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.



An attacker can therefore create a RAR or ZIP archive containing a virus which is not detected by F-Secure.
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This threat impacts software or systems such as F-Secure AV.

Our Vigil@nce team determined that the severity of this computer threat 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 cybersecurity bulletin.

Solutions for this threat

F-Secure AV: corrected versions for RAR and ZIP.
The F-Secure announce indicates corrected versions.
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