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	    Caldera International, Inc. Security Advisory

Subject:		UnixWare 2: su buffer overflow
Advisory number: 	CSSA-2001-SCO.18
Issue date: 		2001 September 21
Cross reference:
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1. Problem Description
	
	The /usr/bin/su command was vulnerable to several buffer
	overflows that could be exploited by a malicious user.


2. Vulnerable Versions

	Operating System	Version		Affected Files
	------------------------------------------------------------------
	UnixWare 2		2.1.3		/usr/bin/su
						/usr/lib/libiaf.a
						/usr/lib/libiaf.so

3. Workaround

	None.


4. UnixWare 2.1.3

  4.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/unixware/CSSA-2001-SCO.18/


  4.2 Verification

	md5 checksums:
	
	365f86daf5fdeafc27777cf1731d08af	erg711838.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/erg711838.Z
	# pkgadd -d /tmp/erg711838


5. References

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

	This advisory addresses Caldera Security internal incidents
	fz517214 and fz518445.

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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