ClamAV contains a flaw that may allow a remote denial of service. The issue is triggered by a file descriptor leak in cli_msexpand() function, located in libclamav/scanners.c, which consumes all available file descriptors and/or memory on the target system. A remote attacker sends approximately 1,000 specially crafted archive files, either by email attachment or directly to a current HTTP session, resulting in a loss of availability of the anti-virus system.
Classification
Location:
Remote / Network Access
Attack Type:
Denial of Service
Impact:
Loss of Availability
Exploit:
Exploit Public
Disclosure:
OSVDB Verified
Solution
Upgrade to version 0.86 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.
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