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			SCO Security Advisory

Subject:		OpenServer 5.0.7 OpenServer 6.0.0 : GhostScript Insecure Temporary File Creation Vulnerability
Advisory number: 	SCOSA-2006.19
Issue date: 		2006 April 11
Cross reference:	fz533156
			CVE-2004-0967 
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1. Problem Description

	Ghostscript is affected by an insecure temporary file creation
	vulnerability.  This issue is likely due to a design error
	that causes the application to fail to verify the existence
	of a file before writing to it.
	
	An attacker may leverage this issue to overwrite arbitrary
	files with the privileges of an unsuspecting user that
	activates the vulnerable application.  Reportedly this issue
	is unlikely to facilitate privilege escalation.
	
	The Common Vulnerabilities and Exposures project
	(cve.mitre.org) has assigned the name CVE-2004-0967 to
	this issue.


2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	OpenServer 5.0.7 		Ghostscript package
	OpenServer 6.0.0 		Ghostscript package


3. Solution

	The proper solution is to install the latest packages.


4. OpenServer 5.0.7

	4.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2006.19


	4.2 Verification

	MD5 (p533156.507_vol.tar) = ae7c290a3b686c4bc01bdd0dc4adc1af

	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:

	1) Download p533156.507_vol.tar to a directory.

	2) Extract VOL* files.

	   # tar xvf p533156.507_vol.tar

	3) Run the custom command, specify an install
	   from media images, and specify the directory as
	   the location of the images.


5. OpenServer 6.0.0

	5.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/openserver6/600/mp/osr600mp2/osr600mp2.iso


	5.2 Verification

	MD5 (osr600mp2.iso) = 7e560dcde374eb60df2b4a599ac20d8a

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


	5.3 Installing Fixed Binaries

	See the SCO OpenServer Release 6.0.0 Maintenance Pack 2 Release
	and Installation Notes:

	ftp://ftp.sco.com/pub/openserver6/600/mp/osr600mp2/osr600mp2.html


6. References

	Specific references for this advisory:
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0967
		http://www.securityfocus.com/bid/11285/references 
		http://secunia.com/advisories/12903/

	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 incidents fz533156.


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

	Trustix security engineers are credited with the discovery of
	this vulnerability.

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