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TITLE:
Clam AntiVirus Two File Handling Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA15859

VERIFY ADVISORY:
http://secunia.com/advisories/15859/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Clam AntiVirus (clamav) 0.x
http://secunia.com/product/2538/

DESCRIPTION:
Two vulnerabilities have been reported in clamav, which can be
exploited by malicious people to cause a DoS (Denial of Service).

1) An error in the "ENSURE_BITS()" macro when validating the header
of a CAB file can lead to an infinite loop when the
"cffile_cffile_FolderOffset" header value is set to "0xff".

Successful exploitation causes clamav to exhaust all system
resources.

2) An error in the "cli_scanszdd()" function causes two file
descriptors to be leaked whenever an attempt to decompress a file
using the "cli_msexpand()" function fails. This causes clamav to
exhaust all file descriptors after scanning approximately 1000
malformed files.

SOLUTION:
Update to version 0.86 or later.

PROVIDED AND/OR DISCOVERED BY:
Discovered by anonymous person and reported via iDEFENSE.

ORIGINAL ADVISORY:
iDEFENSE:
http://www.idefense.com/application/poi/display?id=275&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=276&type=vulnerabilities

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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Please Note:
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Secunia NEVER sends attached files with advisories.
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