TITLE:
UnrealIRCd Server Link TKL Command Denial of Service

SECUNIA ADVISORY ID:
SA19188

VERIFY ADVISORY:
http://secunia.com/advisories/19188/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
UnrealIRCd 3.x
http://secunia.com/product/3663/

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

The vulnerability is caused due to an error within the handling of
the TKL command. This can be exploit to crash the service via a TKL
command with specially-crafted arguments sent from another server.

Successful exploitation requires that the malicious server is allowed
to connect via a server link.

The vulnerability has been reported in version 3.2.3. Prior versions
may also be exploited.

SOLUTION:
Update to version 3.2.4.
http://www.unrealircd.com/?page=downloads

PROVIDED AND/OR DISCOVERED BY:
Reported by vendor.

Additional information and POC by:
Brandon Milner

ORIGINAL ADVISORY:
http://forums.unrealircd.com/viewtopic.php?t=2985

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