Security Update: [CSSA-2001-SCO.23] Open Unix, UnixWare 7: dtsession environment buffer overflow

From: sco-securityat_private
Date: Mon Oct 01 2001 - 11:10:18 PDT

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	    Caldera International, Inc. Security Advisory

Subject:		Open Unix, UnixWare 7: dtsession environment buffer overflow
Advisory number: 	CSSA-2001-SCO.23
Issue date: 		2001 October 1
Cross reference:
___________________________________________________________________________



1. Problem Description
	
	Very long environment variables will cause the dtsession
	command to overflow a buffer.  This could be used by an
	unauthorized user to gain privilege.


2. Vulnerable Versions

	Operating System	Version		Affected Files
	------------------------------------------------------------------
	UnixWare 7		All		/usr/dt/bin/dtsession
	Open Unix		8.0.0		/usr/dt/bin/dtsession


3. Workaround

	None.


4. UnixWare 7

  4.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/openunix/CSSA-2001-SCO.23/


  4.2 Verification

	md5 checksums:

	2883e2ccdb705dcbe7d57420c59c6391	dtsession.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:

	# mv /usr/dt/bin/dtsession /usr/dt/bin/dtsession-
	# uncompress /tmp/dtsession.Z
	# cp dtsession /usr/dt/bin
	# cd /usr/dt/bin
	# chown root dtsession
	# chgrp bin dtsession
	# chmod 4555 dtsession


5. References

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

	This advisory addresses Caldera Security internal incident
	sr850738.

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 <dotslashat_private>
        for discovering and reporting this problem.

	 
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