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TITLE:
Clam AntiVirus clamav-milter Database Update Denial of Service

SECUNIA ADVISORY ID:
SA15835

VERIFY ADVISORY:
http://secunia.com/advisories/15835/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

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

DESCRIPTION:
Damian Menscher has reported a vulnerability in clamav-milter, which
can be exploited by malicious people to cause a DoS (Denial of
Service).

The vulnerability is caused due to a design error in ClamAV's
Sendmail milter that requires it to wait for all existing connections
to terminate and at the same time reject new connections, when it
needs to perform a database update. This can be exploited to cause a
DoS on clamav-milter by opening a persistent connection to Sendmail
when the milter needs to perform an update.

Successful exploitation may cause Sendmail to stop accepting incoming
messages, but requires Sendmail to be configured to scan all messages
using clamav-milter.

SOLUTION:
Update to version 0.86 or later.

PROVIDED AND/OR DISCOVERED BY:
Damian Menscher

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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.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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