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ClamAV UPX and FSG Handling Vulnerabilities
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Secunia Advisory:
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SA16848
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Release Date:
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2005-09-19
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Last Update:
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2005-10-24
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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-2005-2919 (Secunia mirror)
CVE-2005-2920 (Secunia mirror)
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Description:
Two vulnerabilities have been reported in ClamAV, which can be exploited by malicious people to cause a DoS (Denial of Service), or potentially to compromise a vulnerable system.
1) A signedness error in "libclamav/upx.c" can potentially be exploited to cause a heap-based buffer overflow when processing a malformed UPX-compressed executable file with a negative value in the "NumberOfSections" attribute of the PE header.
2) An error in "libclamav/fsg.c" when sorting sections in a FSG (v1.33)-compressed executable file may cause an infinite loop when processing a specially-crafted file containing two sections with the same Relative Virtual Address (RVA).
The vulnerabilities have been reported in version 0.86.2 and prior.
Solution:
Update to version 0.87 or later.
Provided and/or discovered by:
Discovered by anonymous person and reported via iDEFENSE.
Changelog:
2005-10-10: Added information from iDEFENSE. Updated "Description", credits and "Original Advisory" sections.
2005-10-24: Added link to US-CERT vulnerability note.
Original Advisory:
iDEFENSE:
http://www.idefense.com/application/poi/display?id=315&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=316&type=vulnerabilities
Other References:
US-CERT VU#363713:
http://www.kb.cert.org/vuls/id/363713
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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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