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	    Caldera International, Inc. Security Advisory

Subject:		Open UNIX, UnixWare: su buffer overflow
Advisory number: 	CSSA-2001-SCO.7
Issue date: 		2001 October 18
Cross reference:	CSSA-2001-SCO.7 (2001 July 24)
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1. Problem Description
	
	Long values of the TERM variable can cause the su command to
	have a memory fault. This might be exploited by an
	unauthorized user to gain privileges.

	[ The previous version of this fix did not install on UnixWare
	7.1.0. ]

2. Vulnerable Versions

	Operating System	Version		Affected Files
	------------------------------------------------------------------
	UnixWare 7		All		/usr/bin/su
						/sbin/su
	Open UNIX 8		8.0.0		/usr/bin/su
						/sbin/su


3. Workaround

	None.


4. UnixWare 7, Open UNIX 8

  4.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/openunix/CSSA-2001-SCO.7/


  4.2 Verification

	md5 checksums:
	
	0c6985d162a950eb0a7403084475bb70	erg711787d.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/erg711787d.Z
	# pkgadd -d /tmp/erg711787d


5. References

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

        This advisory addresses Caldera Security internal incidents
        sr849768, fz518445, erg711787.


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.


7.Acknowledgements

	Caldera International wishes to thank KF<dotslash@snosoft.com>
	for reporting the problem.
	 
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