to: bugtraq@securityfocus.com announce@lists.caldera.com scoannmod@xenitec.on.ca full-disclosure@lists.netsys.com

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			SCO Security Advisory

Subject:		Open UNIX 8.0.0 UnixWare 7.1.1 : X server insecure popen and buffer overflow
Advisory number: 	CSSA-2002-SCO.38
Issue date: 		2002 August 26
Cross reference:
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1. Problem Description

	The X server did not drop privilege before invoking xkbcomp
	or other external commands. In addition, there was a buffer
	overflow in the same area of the code.

B

2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	Open UNIX 8.0.0			/usr/X/bin/Xsco
	UnixWare 7.1.1			/usr/X/bin/Xsco


3. Solution

	The proper solution is to install the latest packages.


4. Open UNIX 8.0.0

	4.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/OpenUNIX/CSSA-2002-SCO.38


	4.2 Verification

	MD5 (erg711819b.pkg.Z) = 8c06d16b46b7895c545bcdb7c23475d0

	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 commands:

	Download erg711819b.pkg.Z to the /var/spool/pkg directory

	# uncompress /var/spool/pkg/erg711819b.pkg.Z
	# pkgadd -d /var/spool/pkg/erg711819b.pkg


5. UnixWare 7.1.1

	5.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/OpenUNIX/CSSA-2002-SCO.38


	5.2 Verification

	MD5 (erg711819b.pkg.Z) = 8c06d16b46b7895c545bcdb7c23475d0

	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 commands:

	Download erg711819b.pkg.Z to the /var/spool/pkg directory

	# uncompress /var/spool/pkg/erg711819b.pkg.Z
	# pkgadd -d /var/spool/pkg/erg711819b.pkg


6. References

	Specific references for this advisory:
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0987
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0988
		http://marc.theaimsgroup.com/?l=bugtraq&m=88653528226228&w=2

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

	This security fix closes SCO incidents sr850806, fz518676,
	erg711819.


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. Acknowledgements

	This vulnerability was discovered and researched by Olaf
	Kirch (okir@suse.de).