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 (at) autistici (dot) org [email concealed]
web: www.autistici.org/fdonato

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

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1. Description:
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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."

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2. The bug:
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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.

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3. The code:
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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

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4. The fix:
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Vendor was contacted.
Bug will be probably fixed in the next version.

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