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AVG Anti-Virus Engine Malformed ARJ Archive Virus Detection Bypass
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Secunia Advisory:
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SA17186
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Release Date:
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2005-10-13
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Popularity:
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8,395 views
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Critical:
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Not critical
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Impact:
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Security Bypass
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | AVG Antivirus Server
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Description:
fRoGGz has discovered a weakness in AVG Anti-Virus scan engine, which can be exploited by malware to bypass certain scanning functionality.
For more information:
SA17126
The weakness has been confirmed in AVG Email Server Edition version 7.0.344 (267.11.14/131) when scanning an email containing a malformed ".arj" archive with a NULL character prepended to the header. Other versions may also be affected.
NOTE: This is not an issue on client systems, as the malware is still detected upon execution by the desktop on-access scanner.
Solution:
Desktop on-access scanner should be used to ensure that the malware is detected upon extraction.
Filter all compressed file archives at border gateways if they are not required.
Provided and/or discovered by:
fRoGGz, SecuBox Labs
Other References:
SA17126:
http://secunia.com/advisories/17126/
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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