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______________________________________________________________________________

			SCO Security Advisory

Subject:		Linux: wget directory traversal and buffer overrun vulnerabilities
Advisory number: 	CSSA-2003-003.0
Issue date: 		2003 January 16
Cross reference:
______________________________________________________________________________


1. Problem Description

	Stefano Zacchiroli found a buffer overrun in the url_filename
	function, which would make wget segfault on very long urls.

	Steven M. Christey discovered that wget did not verify the FTP
	server response to a NLST command: it must not contain any
	directory information, since that can be used to make a FTP
	client overwrite arbitrary files.


2. Vulnerable Supported Versions

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

	OpenLinux 3.1.1 Server		prior to wget-1.7.1-3.i386.rpm

	OpenLinux 3.1.1 Workstation	prior to wget-1.7.1-3.i386.rpm

	OpenLinux 3.1 Server		prior to wget-1.7.1-3.i386.rpm

	OpenLinux 3.1 Workstation	prior to wget-1.7.1-3.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-2003-003.0/RPMS

	4.2 Packages

	0adc5e5568cc589b9ab90ebb0e181e65	wget-1.7.1-3.i386.rpm

	4.3 Installation

	rpm -Fvh wget-1.7.1-3.i386.rpm

	4.4 Source Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Server/CSSA-2003-003.0/SRPMS

	4.5 Source Packages

	b443ec3aa56abaa8236a88bffebba036	wget-1.7.1-3.src.rpm


5. OpenLinux 3.1.1 Workstation

	5.1 Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-2003-003.0/RPMS

	5.2 Packages

	d5ef7e346ec79bead0cba20189904a11	wget-1.7.1-3.i386.rpm

	5.3 Installation

	rpm -Fvh wget-1.7.1-3.i386.rpm

	5.4 Source Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-2003-003.0/SRPMS

	5.5 Source Packages

	02c04170cbdef2de1b1f2c1a478681f7	wget-1.7.1-3.src.rpm


6. OpenLinux 3.1 Server

	6.1 Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Server/CSSA-2003-003.0/RPMS

	6.2 Packages

	7c2901898d0cc4d0bbb6132d82fefd0e	wget-1.7.1-3.i386.rpm

	6.3 Installation

	rpm -Fvh wget-1.7.1-3.i386.rpm

	6.4 Source Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Server/CSSA-2003-003.0/SRPMS

	6.5 Source Packages

	b19f59dedcd9b2382a41c8af3cf056d0	wget-1.7.1-3.src.rpm


7. OpenLinux 3.1 Workstation

	7.1 Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Workstation/CSSA-2003-003.0/RPMS

	7.2 Packages

	fbba3488352d9617a0b3b6507633c312	wget-1.7.1-3.i386.rpm

	7.3 Installation

	rpm -Fvh wget-1.7.1-3.i386.rpm

	7.4 Source Package Location

	ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Workstation/CSSA-2003-003.0/SRPMS

	7.5 Source Packages

	7a30085d938ad07bde1f67267910a71d	wget-1.7.1-3.src.rpm


8. References

	Specific references for this advisory:

		http://marc.theaimsgroup.com/?l=bugtraq&m=103962838628940&w=2
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1344
		http://www.kb.cert.org/vuls/id/210148

	SCO security resources:

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

	This security fix closes SCO incidents sr872622, fz526854,
	erg712181.


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

	Stefano Zacchiroli and Steve Christey (coley@mitre.org)
	discovered and researched these vulnerabilities.

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