Autor: Marcin P. Ciaszczyk (mpc_at_chzgoda.pl)
Data: Wed 16 Aug 2000 - 10:42:37 MET DST
Date: Tue, 15 Aug 2000 13:32:00 +0200
From: "[iso-8859-1] Peter Gründl" <prg_at_vigilante.com>
To: BUGTRAQ_at_SECURITYFOCUS.COM
Subject: OS/2 Warp 4.5 FTP Server DoS
OS/2 Warp 4.5 FTP Server DoS
Advisory Code: VIGILANTE-2000006
Release Date:
August 15, 2000
Systems Affected:
- OS/2 Warp 4.5 FTP server V4.0/4.2
- OS/2 Warp 4.5 FTP server V4.3
- Probably other versions of the software as well.
THE PROBLEM
The FTP server that comes with OS/2 Warp 4.5 TCP/IP can be brought
down by a
malicious connection attempt.
Vendor Status:
The vendor has released the patch for the problem and it contains
the following explanation of the problem: "Sending username/password
followed immediately by up to 1k of data when connecting to FTP via
Telnet,
can cause a trap. ".
During testing we found that an initial connection attempt (using
sockets,
telnet, ftp etc.) using an invalid username/password combination,
followed
by a second attempt, where the userfield was exceptionally long (256
bytes)
would crash the service.
Fix:
In case you are using a version prior to 4.3, please contact IBM
support for
further assistance.
If you are using v4.3, you can get the patch at the following URL:
ftp://ftp.software.ibm.com/ps/products/tcpip/fixes/v4.3os2/ic27721/
Vendor URL: http://www.ibm.com
Product URL: http://www.ibm.com/software/os/warp/
Copyright VIGILANTe 2000-08-15
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