Date: Fri, 18 May 2001 13:03:22 +0300
From: Tamer Sahin <[email protected]>
To: [email protected]Subject: Tamersahin.net Security Announcement: Debian 2.2 is 2.2r3 Ftpd Daemon Buffer Owerflow Vulnerability
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[email protected]
Copyright (c) 1995-2001 tamersahin.net
