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______________________________________________________________________________

			SCO Security Advisory

Subject:		Linux: fetchmail at-sign buffer overflow vulnerability 
Advisory number: 	CSSA-2003-001.0
Issue date: 		2003 January 09
Cross reference:
______________________________________________________________________________


1. Problem Description

	Heap-based buffer overflow in fetchmail does not account for the
	"@" character when determining buffer lengths for local addresses,
	which allows remote attackers to execute arbitrary code via a
	header with a large number of local addresses.


2. Vulnerable Supported Versions

	System				Package
	----------------------------------------------------------------------

	OpenLinux 3.1.1 Server		prior to fetchmail-6.1.0-4.i386.rpm

	OpenLinux 3.1.1 Workstation	prior to fetchmail-6.1.0-4.i386.rpm

	OpenLinux 3.1 Server		prior to fetchmail-6.1.0-4.i386.rpm

	OpenLinux 3.1 Workstation	prior to fetchmail-6.1.0-4.i386.rpm


3. Solution

	The proper solution is to install the latest packages. Many
	customers find it easier to use the Caldera System Updater, called
	cupdate (or kcupdate under the KDE environment), to update these
	packages rather than downloading and installing them by hand.


4. OpenLinux 3.1.1 Server

	4.1 Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Server/CSSA-2003-001.0/RPMS

	4.2 Packages

	6035679560eb91ad57ec143469744f6f	fetchmail-6.1.0-4.i386.rpm

	4.3 Installation

	rpm -Fvh fetchmail-6.1.0-4.i386.rpm

	4.4 Source Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Server/CSSA-2003-001.0/SRPMS

	4.5 Source Packages

	8324bf38216402b13657e3a137c04f52	fetchmail-6.1.0-4.src.rpm


5. OpenLinux 3.1.1 Workstation

	5.1 Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-2003-001.0/RPMS

	5.2 Packages

	f1205c6cfa4d5a2205eb5596fc3b3efd	fetchmail-6.1.0-4.i386.rpm

	5.3 Installation

	rpm -Fvh fetchmail-6.1.0-4.i386.rpm

	5.4 Source Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-2003-001.0/SRPMS

	5.5 Source Packages

	6bbd2ab3ca320deb7e6bb6255f02c0ee	fetchmail-6.1.0-4.src.rpm


6. OpenLinux 3.1 Server

	6.1 Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Server/CSSA-2003-001.0/RPMS

	6.2 Packages

	f889dbefab6282e17225e98cc8ee9f85	fetchmail-6.1.0-4.i386.rpm

	6.3 Installation

	rpm -Fvh fetchmail-6.1.0-4.i386.rpm

	6.4 Source Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Server/CSSA-2003-001.0/SRPMS

	6.5 Source Packages

	c86a332f4ad72cdd118c111167634c58	fetchmail-6.1.0-4.src.rpm


7. OpenLinux 3.1 Workstation

	7.1 Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Workstation/CSSA-2003-001.0/RPMS

	7.2 Packages

	ed4c33e63e1c430202125ab1f9e9e94c	fetchmail-6.1.0-4.i386.rpm

	7.3 Installation

	rpm -Fvh fetchmail-6.1.0-4.i386.rpm

	7.4 Source Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Workstation/CSSA-2003-001.0/SRPMS

	7.5 Source Packages

	1cb257a1a13481b518fa3ef0016cef4c	fetchmail-6.1.0-4.src.rpm


8. References

	Specific references for this advisory:

		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1365
		http://security.e-matters.de/advisories/052002.html	

	SCO security resources:

		http://www.sco.com/support/security/index.html

	This security fix closes SCO incidents sr872719, fz526873,
	erg712185.


9. Disclaimer

	SCO is not responsible for the misuse of any of the information
	we provide on this website and/or through our security
	advisories. Our advisories are a service to our customers intended
	to promote secure installation and use of SCO products.


10. Acknowledgements

	Stefan Esser <s.esser@e-matters.de> discovered and researched
	this vulnerability.

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