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______________________________________________________________________________

			SCO Security Advisory

Subject:		UnixWare 7.1.4 UnixWare 7.1.3 : The error handling in the inflate and inflateBack functions in ZLib compression library allows local users to cause a denial of service
Advisory number: 	SCOSA-2004.17
Issue date: 		2004 October 18
Cross reference:	sr891410 fz530158 erg712692 VU#238678 CAN-2004-0797
______________________________________________________________________________


1. Problem Description

	CERT Vulnerability Note VU#238678 Un-handled error conditions
	in the zlib compression library may allow an attacker to
	cause a denial-of-service condition.

	The Common Vulnerabilities and Exposures project
	(cve.mitre.org) has assigned the following name
	CAN-2004-0797 to this issue.

2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	UnixWare 7.1.4 			/usr/include/zconf.h
					/usr/include/zlib.h
					/usr/lib/libz.so.1.2.1
	UnixWare 7.1.3 			/usr/include/zconf.h
					/usr/include/zlib.h
					/usr/lib/libz.so.1.2.1

3. Solution

	The proper solution is to install the latest packages.

4. UnixWare 7.1.4

	4.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2004.17

	4.2 Verification

	MD5 (erg712692.714.pkg) = 0b56f889838a2daaed77f8251922391e

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

	4.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following sequence:

	Download erg712692.714.pkg to the /var/spool/pkg directory

	# pkgadd -d /var/spool/pkg/erg712692.714.pkg


5. UnixWare 7.1.3

	5.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2004.17

	5.2 Verification

	MD5 (erg712692.pkg) = 5c48d63e7f5922dccf38f6d6fa66b325

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

	5.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following sequence:

	Download erg712692.pkg to the /var/spool/pkg directory

	# pkgadd -d /var/spool/pkg/erg712692.pkg

6. References

	Specific references for this advisory:
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0797

	SCO security resources:
		http://www.sco.com/support/security/index.html

	SCO security advisories via email
		http://www.sco.com/support/forums/security.html

	This security fix closes SCO incidents sr891410 fz530158
	erg712692.


7. Disclaimer

	SCO 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 SCO
	products.


8. Acknowledgments

	SCO would like to thank Johan Thelmen for his help in finding
	and fixing this bug.

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