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			SCO Security Advisory

Subject:		OpenServer 5.0.6 OpenServer 5.0.7 OpenServer 6.0.0 : BIND Denial of Service Vulnerability
Advisory number:	SCOSA-2006.1
Issue date:		2006 January 03
Cross reference:	sr892955 fz531004 erg712788
			CVE-2005-0033 VU#327633
______________________________________________________________________________


1. Problem Description

	BIND (the Berkeley Internet Name Daemon) is the Domain Name
	Service for Unix systems. BIND version 8.4.4 is vulnerable to a
	remote denial of service attack, caused by a buffer overflow in
	the in q_usedns array.
	
	The Common Vulnerabilities and Exposures project (cve.mitre.org)
	has assigned the name CVE-2005-0033 to this issue.


2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	OpenServer 5.0.6 		bind distribution
	OpenServer 5.0.7 		bind distribution
	OpenServer 6.0.0 		bind distribution


3. Solution

	The proper solution is to install the latest packages.


4. OpenServer 5.0.6

	4.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2006.1


	4.2 Verification

	MD5 (p531004.507_vol.tar) = 708a75f3307ffbeaf9b8d9aba3cef7df

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


	4.3 Installing Fixed Binaries

	The following package should be installed on your system before
	you install this fix:

		OSS646C

	Upgrade the affected binaries with the following sequence:

	1) Download p531004.507_vol.tar file to a directory.

	2) Extract VOL* files.

	   # tar xvf p531004.507_vol.tar

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


5. OpenServer 5.0.7

	5.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2006.1


	5.2 Verification

	MD5 (p531004.507_vol.tar) = 708a75f3307ffbeaf9b8d9aba3cef7df

	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:

	1) Download p531004.507_vol.tar file to a directory.

	2) Extract VOL* files.

	   # tar xvf p531004.507_vol.tar

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


6. OpenServer 6.0.0

	6.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/OpenServer/SCOSA-2006.1


	6.2 Verification

	MD5 (p531004.600_vol.tar) = d15f8ccbceb67cce746c4a67189145d9

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


	6.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following sequence:

	1) Download p531004.600_vol.tar file to a directory.

	2) Extract VOL* files.

	   # tar xvf p531004.600_vol.tar

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


7. References

	Specific references for this advisory:
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0033
		http://www.kb.cert.org/vuls/id/VU#327633
		http://www.uniras.gov.uk/niscc/docs/al-20050125-00059.html?lang=en
		http://xforce.iss.net/xforce/xfdb/19063

	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 sr892955 fz531004
	erg712788.


8. 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.

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