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TITLE:
Dovecot Mailbox Large Header Denial of Service

SECUNIA ADVISORY ID:
SA38881

VERIFY ADVISORY:
http://secunia.com/advisories/38881/

DESCRIPTION:
A vulnerability has been reported in Dovecot, which can be exploited
by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error when processing certain
large headers, which can be exploited to cause a high CPU load by
sending a specially crafted email to the system.

Successful exploitation requires that the "mbox" mail directory
format is used.

The vulnerability is reported in versions prior to 1.2.11 of the
1.2.x branch. The 1.0.x and 1.1.x branches are not affected.

SOLUTION:
Update to version 1.2.11.

PROVIDED AND/OR DISCOVERED BY:
Stan Hoeppner and Kostik

ORIGINAL ADVISORY:
http://www.dovecot.org/list/dovecot-news/2010-March/000152.html
http://dovecot.org/pipermail/dovecot/2010-February/047190.html
http://dovecot.org/pipermail/dovecot/2010-February/047058.html

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