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Clam AntiVirus CHM Unpacker and PE Rebuilding Vulnerabilities
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Secunia Advisory:
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SA22370
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Release Date:
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2006-10-16
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Last Update:
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2006-11-08
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Popularity:
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14,205 views
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Critical:
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Highly critical
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Impact:
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DoS
System access
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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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| CVE reference: | CVE-2006-4182
CVE-2006-5295
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Description:
Two vulnerabilities have been reported in Clam AntiVirus, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a vulnerable system.
1) An out-of-bounds memory access error in the CHM (Compressed HTML Help) unpacker in chmunpack.c can be exploited to crash the virus scanning service via a specially crafted CHM file.
2) An integer overflow error in rebuildpe.c when rebuilding PE files after unpacking can be exploited to cause a heap-based buffer overflow via a specially crafted executable.
Successful exploitation of this vulnerability may allow execution of arbitrary code.
The vulnerabilities are reported in version 0.88.4. Prior versions may also be affected.
Solution:
Update to version 0.88.5.
Provided and/or discovered by:
Discovered by an anonymous person and Damian Put and reported via iDefense Labs.
Changelog:
2006-10-17: Added details provided by iDefense Labs.
2006-11-08: Added link to US-CERT.
Original Advisory:
Clam AntiVirus:
http://sourceforge.net/project/shownotes.php?release_id=455799
iDefense Labs:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=422
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=423
Other References:
US-CERT VU#180864:
http://www.kb.cert.org/vuls/id/180864
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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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