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	    Caldera International, Inc. Security Advisory

Subject:		UnixWare 2: xlock buffer overflow
Advisory number: 	CSSA-2001-SCO.19
Issue date: 		2001 September 21
Cross reference:
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1. Problem Description
	
	Very long arguments to the /usr/X/bin/xlock command would
	overflow an internal buffer. This could be used by a malicious
	user to gain privilege.
		


2. Vulnerable Versions

	Operating System	Version		Affected Files
	------------------------------------------------------------------
	UnixWare 2		2.1.3		/usr/X/bin/xlock


3. Workaround

	None.


4. UnixWare 2

  4.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/unixware/CSSA-2001-SCO.19/


  4.2 Verification

	md5 checksums:
	
	b8382d0223db94c24c5ad2f560da872b	erg711837.Z


	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:

	# uncompress /tmp/erg711837.Z
	# pkgadd -d /tmp/erg711837


5. References

	This and other advisories are located at
		http://stage.caldera.com/support/security

	This advisory addresses Caldera Security internal incident
	fz518827.

6. Disclaimer

	Caldera International, Inc. is not responsible for the misuse
	of any of the information we provide on our website and/or
	through our security advisories. Our advisories are a service
	to our customers intended to promote secure installation and
	use of Caldera International products.

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