-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


______________________________________________________________________________

			SCO Security Advisory

Subject:		UnixWare 7.1.4 : Multiple Vulnerabilities in libpng
Advisory number: 	SCOSA-2004.16
Issue date: 		2004 October 07
Cross reference:	sr891394 fz530149 erg712684 CAN-2004-0597 CAN-2004-0598 CAN-2004-0599 CAN-2004-0768 VU#388984 VU#236656 VU#160448 VU#477512 VU#817368 VU#286464 TA04-217A
______________________________________________________________________________


1. Problem Description

	Several vulnerabilities exist in the libpng library, the
	most serious of which could allow a remote attacker to
	execute arbitrary code on an affected system. 

	CERT Technical Cyber Security Alert TA04-217A 

	VU#388984 - libpng fails to properly check length of 
	            transparency chunk (tRNS) data.  The  
	            Common Vulnerabilities and Exposures project 
	            (cve.mitre.org) has assigned the following name 
	            CAN-2004-0597 to this issue.

	VU#236656 - libpng png_handle_iCCP() NULL pointer dereference 
	            The  Common Vulnerabilities and Exposures project 
	            (cve.mitre.org) has assigned the following name 
	            CAN-2004-0598 to this issue.

	VU#160448 - libpng integer overflow in image height processing 
	            The  Common Vulnerabilities and Exposures project 
	            (cve.mitre.org) has assigned the following name 
	            CAN-2004-0599 to this issue.

	VU#477512 - libpng png_handle_sPLT() integer overflow 
	            The  Common Vulnerabilities and Exposures project 
	            (cve.mitre.org) has assigned the following name 
	            CAN-2004-0599 to this issue.

	VU#817368 - libpng png_handle_sBIT() performs insufficient 
	            bounds checking.  The  Common Vulnerabilities 
	            and Exposures project (cve.mitre.org) has assigned 
	            the following name CAN-2004-0597 to this issue.

	VU#286464 - libpng contains integer overflows in progressive display
	            image reading.  The  Common Vulnerabilities and Exposures 
	            project (cve.mitre.org) has assigned the following name 
	            CAN-2004-0599 to this issue.

2. Vulnerable Supported Versions

	System				Files
	----------------------------------------------------------------------
	UnixWare 7.1.4 			/usr/include/png.h
					/usr/include/pngconf.h
					/usr/lib/libpng.a
					/usr/lib/libpng.so.3.1.2.7
					/usr/man/man.3/libpng.3
					/usr/man/man.3/libpngpf.3
					/usr/man/man.5/png.5
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-2004.16

	4.2 Verification

	MD5 (erg712684.pkg) = 78920b002aaeb097149084dc7451ce83

	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 erg712684.pkg to the /var/spool/pkg directory

	# pkgadd -d /var/spool/pkg/erg712684.pkg


5. References

	Specific references for this advisory:
		http://libpng.sourceforge.net 
		http://www.libpng.org/pub/png 
		http://scary.beasts.org/security/CESA-2004-001.txt 
		http://www.us-cert.gov/cas/techalerts/TA04-217A.html 
		http://www.kb.cert.org/vuls/id/388984 
		http://www.kb.cert.org/vuls/id/817368 
		http://www.kb.cert.org/vuls/id/286484 
		http://www.kb.cert.org/vuls/id/477512 
		http://www.kb.cert.org/vuls/id/160448 
		http://www.kb.cert.org/vuls/id/236656 
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0597 
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0598 
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0599

	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 sr891394 fz530149
	erg712684 CAN-2004-0597 CAN-2004-0598 CAN-2004-0599
	CAN-2004-0768 VU#388984 VU#236656 VU#160448 VU#477512
	VU#817368 VU#286464.


6. 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.


7. Acknowledgments

	SCO would like to thank Chris Evans for researching and
	reporting these vulnerabilities.

______________________________________________________________________________

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (SCO/UNIX_SVR5)

iD8DBQFBZdG0aqoBO7ipriERAo4yAJ9Jq0kJcbjQ7Pi/aeRbTWk9zsk/owCffQxQ
wl3Jg/u6CafJ0Pqm4OzB3cM=
=y7cQ
-----END PGP SIGNATURE-----