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ClamAV Multiple Vulnerabilities
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Secunia Advisory:
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SA28117
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Release Date:
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2007-12-19
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Last Update:
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2008-01-02
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Popularity:
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7,029 views
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Critical:
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Highly critical
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Impact:
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DoS
System access
Unknown
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Clam AntiVirus (clamav) 0.x
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Binary Analysis:
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BA331 :: Available for Credits 
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| CVE reference: | CVE-2007-6335
CVE-2007-6336
CVE-2007-6337
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Description:
Some vulnerabilities have been reported in ClamAV, where one vulnerability has an unknown impact and others can be exploited by malicious people to cause a DoS (Denial of Service) or compromise a vulnerable system.
1) An integer overflow error exists within the "cli_scanpe()" function when handling MEW packed executables. This can be exploited to cause a heap-based buffer overflow via specially crafted "ssize" and "dsize" values.
Successful exploitation allows execution of arbitrary code.
2) An off-by-one error exists within libclamav/mspack.c when handling MSZIP compressed files. This can be exploited to e.g. crash the scanner or potentially execute arbitrary code via a specially crafted MSZIP compressed file.
3) An boundary error exists within the bzip2 "BZ_GET_FAST()" and "BZ_GET_FAST_C()" decompression macros in libclamav/nsis/bzlib_private.h.
The vulnerabilities are reported in versions prior to 0.92.
Solution:
Update to version 0.92.
Provided and/or discovered by:
1) Discovered by an anonymous researcher and reported via iDefense Labs.
2) Reported in a bug by Török Edwin.
3) Reported via a Gentoo security advisory.
Changelog:
2007-12-20: Updated advisory to include vulnerability #2. Updated CVE references.
2008-01-02: Updated advisory to include vulnerability #3. Updated CVE references.
Original Advisory:
ClamAV:
http://sourceforge.net/project/showno...?release_id=562254&group_id=86638
iDefense:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=634
Bug 663:
https://wwws.clamav.net/bugzilla/show_bug.cgi?id=663
Gentoo:
http://www.gentoo.org/security/en/glsa/glsa-200712-20.xml
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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.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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