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TITLE:
Visual IRC JOIN Command Response Processing Buffer Overflow

SECUNIA ADVISORY ID:
SA25977

VERIFY ADVISORY:
http://secunia.com/advisories/25977/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Visual IRC 2.x
http://secunia.com/product/14738/

DESCRIPTION:
Krystian Kloskowski has discovered a vulnerability in Visual IRC,
which can be exploited by malicious people to compromise a user's
system.

The vulnerability is caused due to a boundary error when processing
an IRC server's response to a "JOIN" command. This can be exploited
to cause a stack-based buffer overflow via an overly long, specially
crafted string in response to the affected command.

Successful exploitation allows execution of arbitrary code, but
requires that a user is e.g. tricked into connecting to a malicious
IRC server.

The vulnerability is confirmed in version 2.0. Other versions may
also be affected.

SOLUTION:
Do not connect to untrusted IRC servers.

PROVIDED AND/OR DISCOVERED BY:
Krystian Kloskowski

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/4152

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