To: bugtraq@securityfocus.com announce@lists.caldera.com scoannmod@xenitec.on.ca


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		Caldera International, Inc.  Security Advisory

Subject:		Open UNIX 8.0.0 UnixWare 7.1.1 : X server allows access to any shared memory on the system
Advisory number: 	CSSA-2002-SCO.14
Issue date: 		2002 April 08
Cross reference:
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1. Problem Description

	Any user with local X access can exploit the MIT-SHM extension
	and gain read/write access to any shared memory segment on
	the system.


2. Vulnerable Supported Versions

	System				Package
	----------------------------------------------------------------------
	Open UNIX 8.0.0 		xserver
	UnixWare 7.1.1 			xserver


3. Solution

	The proper solution is to install the latest packages.


4. Open UNIX 8.0.0

	4.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/openunix/CSSA-2002-SCO.14


4.2 Verification

	MD5 (xserver.800a.pkg) = 471bd0d4c43b32d4b04003d78a218c97

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


4.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following commands:

	Download xserver.800a.pkg to the /var/spool/pkg directory

	# pkgadd -d /var/spool/pkg/xserver.800a.pkg


5. UnixWare 7.1.1

	5.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/openunix/CSSA-2002-SCO.14


5.2 Verification

	MD5 (xserver.711b.pkg) = 545aafcdcfff532ed25dbffea0d06336

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


5.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following commands:

	Download xserver.711b.pkg to the /var/spool/pkg directory

	# pkgadd -d /var/spool/pkg/xserver.711b.pkg


6. References

	Specific references for this advisory:
		none

	Caldera UNIX security resources:
		http://stage.caldera.com/support/security/

Caldera OpenLinux security resources:
		http://www.caldera.com/support/security/index.html

This security fix closes Caldera incidents sr860994, fz520243
	and erg711973.


7. Disclaimer

	Caldera International, Inc. 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 Caldera products.


8. Acknowledgements

	Roberto Zunino discovered and researched this vulnerability.