-----BEGIN PGP SIGNED MESSAGE-----

Subject: Caldera Security Advisory SA-1997.27: Vulnerability in wu-ftpd

Caldera Security Advisory SA-1997.27

Original report date:	25-Sep-1997
RPM build date:		19-Nov-1997
Advisory issue date:	26-Nov-1997

Topic: Vulnerability in the wu-ftpd package


I. Problem Description

	A vulnerability exists within WU-FTPD that allows a denial of service 
	attack.  Arbitrary individuals can shut down the FTP server. 


II. Impact

	On systems such as Caldera OpenLinux 1.1, an unprivileged
	user connecting to the FTP server can send it a command that
	will consume considerable CPU and memory resources. Doing so on
	several FTP sessions simultaneously can drive up the system load
	to a point where the machine becomes unusable.

	This problem was present on the following OpenLinux releases:

		Base 1.0
		Lite 1.1
		Base 1.1
		Standard 1.1

	To determine if you are affected and need this update you may do
	the following:

		rpm -q wu-ftpd

	If the results show wu-ftpd-2.4.2b12-3 or earlier then you will need
	to update.


III. Solution

	The proper solution is to install the new wu-ftpd package. 
	This package is located on Caldera's FTP server (ftp.caldera.com):

	The binary RPM can be obtained at:
	ftp://ftp.caldera.com/pub/openlinux/updates/1.1/current/RPMS

	The source RPM can be obtained at:
	ftp://ftp.caldera.com/pub/openlinux/updates/1.1/current/SRPMS

	All that is required to do to install the fix is the following:

		rpm -U wu-ftpd-2.4.2b15-4.i386.rpm

	The MD5 checksums (from the "md5sum" command) for these packages are:

	71ffc9f6e22496597ee4be7f998998af  wu-ftpd-2.4.2b15-4.i386.rpm
	4874b109bbeb6a73112bb9822de6b48d  wu-ftpd-2.4.2b15-4.src.rpm


IV. References

	This and other Caldera security resources are located at:

		http://www.caldera.com/tech-ref/security/

	This advisory is based on message posted to the Bugtraq Mail email
	list.   For more information see the Bugtraq archive at:

		http://www.geek-girl.com/bugtraq/1997_3/0424.html

	This Security Alert closes Caldera internal problem report #1106.


V. PGP Signature

	This message was signed with the PGP key for <security@caldera.com>.

	This key can be obtained from:
		ftp://ftp.caldera.com/pub/pgp-keys/

	Or on an OpenLinux CDROM under:
		/OpenLinux/pgp-keys/

	$Id: SA-1997.27,v 1.2 1997/11/27 01:08:31 ron Exp ron $

-----BEGIN PGP SIGNATURE-----
Version: 2.6.2

iQCVAwUBNHzIl+n+9R4958LpAQGM5AP+JkrAhGzjeo71QiOEqdvw3OrTZXwirXuM
/7qVyHpJy5qk233B1gRUgOZLH+t13yQ/4VCiYuo+NWkcBbGphDAd5loM+2gD2Y9s
z3cBNwOwAZlu0VR3gy7usiPtyePsdt6WVKseua3AXPZBVrrZmmk6SosTa74lc4EU
ZRvnp5uKzb0=
=k63u
-----END PGP SIGNATURE-----