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TITLE:
Undernet ircu "send_user_mode" Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA29486

VERIFY ADVISORY:
http://secunia.com/advisories/29486/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Undernet ircu 2.x
http://secunia.com/product/18008/

DESCRIPTION:
Chris Porter has reported a vulnerability in Undernet ircu, which can
be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error when processing arguments
in the "send_user_mode" function and can be exploited to crash the
daemon via a specially crafted "/mode" command.

The vulnerability is reported in 2.10.12.12. Other versions may also
be affected.

SOLUTION:
Grant only trusted users access to the application.

PROVIDED AND/OR DISCOVERED BY:
Chris Porter

ORIGINAL ADVISORY:
http://lists.grok.org.uk/pipermail/full-disclosure/2008-March/060906.html

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