bugtraq - DoS in Crackalaka 1.0.8

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20040409125837.7ECF423FC5@chernobyl.investici.org>
Date: Fri, 9 Apr 2004 12:58:37 -0000
From: "Donato Ferrante" <fdonato@...istici.org>
To: <bugtraq@...urityfocus.com>
Subject: DoS in Crackalaka 1.0.8

                           Donato Ferrante

Application:  Crackalaka
              http://www.stalphonsos.com/~attila/crackalaka

Version:      1.0.8

Bug:          Denial Of Service

Date:         09-Apr-2004

Author:       Donato Ferrante
              e-mail: fdonato@...istici.org
              web:    www.autistici.org/fdonato

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

1. Description
2. The bug
3. The code
4. The fix

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

----------------
1. Description:
----------------

Vendor's description:

"Crackalaka is a small, standalone IRC server. 
It does not implement the inter-server portions of the IRC protocol,
and is meant for use by a small workgroup, preferably behind a
firewall."

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

------------
2. The bug:
------------

The program is unable to manage a lot of not regular strings, in fact
it crashes.

The problem is in the function: hash_strcmp() of hash.c, in which
the program try to manage an unallocated sector of memory.

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

-------------
3. The code:
-------------

To test the vulnerability try to send to the irc server some big and
unregular strings or more simply you can use:

nc [host] 6667 < /dev/urandom

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

------------
4. The fix:
------------

Vendor was contacted.
Bug will be probably fixed in the next version.

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx