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Insecure Library Loading
Highly critical

ClamAV Scanning Bypass and Memory Corruption

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Release Date:  2010-04-07    Last Update:  2010-04-12    Views:  6,142

Secunia Advisory SA39329

Where:

From remote

Impact:

Security Bypass, DoS, System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


A weakness and a vulnerability have been reported in ClamAV, which can be exploited by malicious people to bypass the scanning functionality or potentially compromise a vulnerable system.

1) An error when processing archives can be exploited to bypass the anti-virus scanning functionality via specially crafted CAB files.

2) An error exists within the "qtm_decompress()" function in libclamav/mspack.c. This can be exploited to cause a memory corruption when a specially crafted Quantum-compressed file is scanned.

Successful exploitation of this vulnerability may allow execution of arbitrary code.

The weakness and the vulnerability are reported in versions prior to 0.96.


Solution:
Update to version 0.96.

Provided and/or discovered by:
1) ReversingLabs Corp, reported via CERT-FI
2) Reported by Török Edwin in a ClamAV bug report.

Original Advisory:
https://wwws.clamav.net/bugzilla/show_bug.cgi?id=1826
https://wwws.clamav.net/bugzilla/show_bug.cgi?id=1771

http://git.clamav.net/gitweb?p=clamav-devel.git;a=blob_plain;f=ChangeLog;hb=clamav-0.96

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: ClamAV Scanning Bypass and Memory Corruption

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