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 			SCO Security Advisory

Subject:		UnixWare 7.1.3 UnixWare 7.1.4 : Lynx NNTP Buffer Overflow Vulnerability
Advisory number: 	SCOSA-2005.47
Issue date: 		2005 November 08
Cross reference:	fz533159
 			CVE-2005-3120
______________________________________________________________________________


1. Problem Description

 	Ulf Harnhammar has reported a vulnerability in Lynx, which can
 	be exploited by malicious people to compromise a user's system.

 	The vulnerability is caused due to a boundary error in the
 	"HTrjis()" function in the handling of article headers sent from
 	NNTP (Network News Transfer Protocol) servers. This can be
 	exploited to cause a stack-based buffer overflow by e.g.
 	tricking a user into visiting a malicious web site which
 	redirects to a malicious NNTP server via the "nntp:" URI
 	handler.

 	Successful exploitation allows execution of arbitrary code.

 	The Common Vulnerabilities and Exposures project (cve.mitre.org)
 	has assigned the name CVE-2005-3120 to this issue.


2. Vulnerable Supported Versions

 	System				Binaries
 	----------------------------------------------------------------------
 	UnixWare 7.1.3			/usr/gnu/bin/lynx
 	UnixWare 7.1.4			/usr/gnu/bin/lynx


3. Solution

 	The proper solution is to install the latest packages.


4. UnixWare 7.1.3

 	4.1 Location of Fixed Binaries

 	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.47


 	4.2 Verification

 	MD5 (p533159.image) = bc3fd8c36aea096b7ed75a2f27950b1e

 	md5 is available for download from
 		ftp://ftp.sco.com/pub/security/tools


 	4.3 Installing Fixed Binaries

 	Upgrade the affected binaries with the following sequence:

 	Download p533159.image to the /var/spool/pkg directory

 	# pkgadd -d /var/spool/pkg/p533159.image


5. UnixWare 7.1.4

 	5.1 Location of Fixed Binaries

 	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.47


 	5.2 Verification

 	MD5 (p533159.image) = bc3fd8c36aea096b7ed75a2f27950b1e

 	md5 is available for download from
 		ftp://ftp.sco.com/pub/security/tools


 	5.3 Installing Fixed Binaries

 	Upgrade the affected binaries with the following sequence:

 	Download p533159.image to the /var/spool/pkg directory

 	# pkgadd -d /var/spool/pkg/p533159.image


6. References

 	Specific references for this advisory:
 		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3120
 		http://lists.grok.org.uk/pipermail/full-disclosure/2005-October/038019.html
 		http://securitytracker.com/id?1015065
 		http://secunia.com/advisories/17216

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

 	SCO security advisories via email
 		http://www.sco.com/support/forums/security.html

 	This security fix closes SCO incident fz533159.


7. 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.


8. Acknowledgments

 	SCO would like to thank Ulf Harnhammar for reporting this
 	vulnerability.

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