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		Caldera International, Inc.  Security Advisory

Subject:		OpenServer 5.0.5 OpenServer 5.0.6 : popper buffer overflow and denial-of-service
Advisory number: 	CSSA-2002-SCO.20
Issue date: 		2002 May 22
Cross reference:
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1. Problem Description

	/etc/popper will go into a loop if a character string of
	length 2048 (or more) is sent to it.

	If the bulldir variable in the user's config file is longer
	than 256 characters, popper will memory fault.


2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	OpenServer 5.0.5		/etc/popper
	OpenServer 5.0.6		/etc/popper


3. Solution

	The proper solution is to install the latest packages.


4. OpenServer 5.0.5

	4.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.20


	4.2 Verification

	MD5 (VOL.000.000) = f2746cddde194cb93e5ad1b41637a75c

	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:

	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://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.20


	5.2 Verification

	MD5 (VOL.000.000) = f2746cddde194cb93e5ad1b41637a75c

	md5 is available for download from
		ftp://stage.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 UNIX security resources:
		http://stage.caldera.com/support/security/

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

	This security fix closes Caldera incidents sr863699, fz520822,
	erg712033.


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

	Marcell Fodor reported the memory fault issue. Dustin Childers
	reported the denial-of-service issue.

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