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			SCO Security Advisory

Subject:		UnixWare 7.1.1 Open UNIX 8.0.0 UnixWare 7.1.3 : REVISED: Lax permissions on /dev/X
Advisory number: 	CSSA-2003-SCO.4.2
Issue date: 		2003 March 12
Cross reference:	CSSA-2003-SCO.4 CSSA-2003-SCO.4.1
______________________________________________________________________________


1. Problem Description

	The /dev/X directory is world readable and writable, and
	the files in it are also world readable and writable.
	Denial-of-Service attacks are possible, as well as possible
	data hijacking. The X server sets these permissions when
	it starts up, so there is no workaround for this issue.

	The 4.1 update of this advisory fixed an install problem on
	Open UNIX 8 and UnixWare 7.1.3.

	The 4.2 update of this advisory updates the Open UNIX 8
	packages to also fix security issues related to insecure popen
	calls and buffer overflows.  These vulnerabilities were
	already fixed in the UnixWare 7.1.1 and 7.1.3 packages
	released with the 4.1 advisory.


2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	UnixWare 7.1.1			Standard X Distribution
	Open UNIX 8.0.0			Standard X Distribution
	UnixWare 7.1.3			Standard X Distribution

3. Solution

	The proper solution is to install the latest packages.


4. UnixWare 7.1.1

	4.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/UnixWare/CSSA-2003-SCO.4.2


	4.2 Verification

	MD5 (basex711.pkg.Z) = 510888d562f6c2249555fefdae94d49d
	MD5 (xserver711.pkg.Z) = 74797f12d6e3e80300980854050f62ef

	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 basex711.pkg.Z to the /var/spool/pkg directory
	Download xserver711.pkg.Z to the /var/spool/pkg directory

	# uncompress /var/spool/pkg/basex711.pkg.Z
	# pkgadd -d /var/spool/pkg/basex711.pkg
	# uncompress /var/spool/pkg/xserver711.pkg.Z
	# pkgadd -d /var/spool/pkg/xserver711.pkg


5. Open UNIX 8.0.0

	5.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/UnixWare/CSSA-2003-SCO.4.2


	5.2 Verification

	MD5 (basex800.pkg) = 835c516771b298be1f7c25408fbe788e
	MD5 (xserver800.pkg) = cc26992e7022b778b0b84164f113656e

	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 basex800.pkg to the /var/spool/pkg directory
	Download xserver800.pkg to the /var/spool/pkg directory

	# pkgadd -d /var/spool/pkg/basex800.pkg
	# pkgadd -d /var/spool/pkg/xserver800.pkg


6. UnixWare 7.1.3

	6.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/UnixWare/CSSA-2003-SCO.4.2


	6.2 Verification

	MD5 (basex713.pkg) = 30feecb01b9cb2ad3477840b25896e0d
	MD5 (xserver713.pkg) = a97371c5e1f0d3e147d05c6ebb71b3b8

	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:

	Download basex713.pkg to the /var/spool/pkg directory
	Download xserver713.pkg to the /var/spool/pkg directory

	# pkgadd -d /var/spool/pkg/basex713.pkg
	# pkgadd -d /var/spool/pkg/xserver713.pkg


7. References

	Specific references for this advisory:
		none

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

	This security fix closes SCO incidents sr874992, sr874607,
	fz527440, erg712231, sr850806, fz518676, erg711819.


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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