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TITLE:
Dovecot LDAP Auth Cache Security Bypass

SECUNIA ADVISORY ID:
SA28271

VERIFY ADVISORY:
http://secunia.com/advisories/28271/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
Dovecot 1.x
http://secunia.com/product/10191/

DESCRIPTION:
A security issue has been reported in Dovecot, which can be exploited
by malicious users to bypass certain security restrictions.

The security issue is caused due to an error within the LDAP
authentication functionality when auth cache is enabled. This can be
exploited by a malicious user to log in with the same cached
"pass_attrs" of another user (e.g. gain access to the other user's
mailbox), which is logged in "auth_cache_ttl" seconds before the
malicious user.

Successful exploitation requires non-default configuration settings
and that the two users share the same "password" and "pass_filter"
variables. Please see the vendor advisory for further details.

The security issue is reported in versions 1.0.rc11 through 1.0.9.

SOLUTION:
Update to version 1.0.10.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.dovecot.org/list/dovecot-news/2007-December/000057.html

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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:
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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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