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

______________________________________________________________________________

		Caldera International, Inc.  Security Advisory

Subject:		OpenServer 5.0.5 OpenServer 5.0.6 : uux status file name buffer overflow
Advisory number: 	CSSA-2002-SCO.34
Issue date: 		2002 July 15
Cross reference:
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1. Problem Description

	A very long status file name given to the uux program would
	cause it to memory fault. This could be used by a malicious
	local user to gain privilege.


2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	OpenServer 5.0.5		/usr/bin/uux
	OpenServer 5.0.6		/usr/bin/uux


3. Solution

	The proper solution is to install the latest packages.


4. OpenServer 5.0.5

	4.1 Location of Fixed Binaries

	ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.34


4.2 Verification

	MD5 (VOL.000.000) = 77bd1623ed1d220f976736124b743fc7

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


4.3 Installing Fixed Binaries

		Upgrade the affected binaries with the following commands:

	1) Download the VOL* files to the /tmp directory

	Run the custom command, specify an install from media images,
	and specify the /tmp directory as the location of the images.


5. OpenServer 5.0.6

	5.1 Location of Fixed Binaries

	ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.34


5.2 Verification

	MD5 (VOL.000.000) = 77bd1623ed1d220f976736124b743fc7

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


5.3 Installing Fixed Binaries

		Upgrade the affected binaries with the following commands:

	1) Download the VOL* files to the /tmp directory

	Run the custom command, specify an install from media images,
	and specify the /tmp directory as the location of the images.


6. References

	Specific references for this advisory:
		none

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

This security fix closes Caldera incidents sr865287, fz521102,
	erg712066.


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

	KF <dotslash@snosoft.com> discovered and researched this
	vulnerability.