To: bugtraq@securityfocus.com announce@lists.caldera.com scoannmod@xenitec.on.ca

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		Caldera International, Inc.  Security Advisory

Subject:		UnixWare 7.1.1 Open UNIX 8.0.0 : ppptalk root privilege vulnerability
Advisory number: 	CSSA-2002-SCO.27
Issue date: 		2002 June 18
Cross reference:
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1. Problem Description

	If pppd is running (which it is on a default installation),
	a malicious user can use /usr/bin/ppptalk (or its link,
	/usr/bin/ppp), to gain root privileges.


2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	UnixWare 7.1.1			/usr/bin/ppptalk
	Open UNIX 8.0.0			/usr/bin/ppptalk


3. Solution

	The proper solution is to install the latest packages.
	However, removing the setuid bits from the /etc/ppptalk
	binary will effectively eliminate the vulnerability.


4. UnixWare 7.1.1

	4.1 Location of Fixed Binaries

	ftp://ftp.caldera.com/pub/updates/OpenUNIX/CSSA-2002-SCO.27


4.2 Verification

	MD5 (erg712071.pkg.Z) = 9e353b58860c1b2ab4e831410f44fa12

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


4.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following commands:

	Download erg712071.pkg.Z to the /var/spool/pkg directory

	# uncompress /var/spool/pkg/erg712071.pkg.Z
	# pkgadd -d /var/spool/pkg/erg712071.pkg


5. Open UNIX 8.0.0

	5.1 Location of Fixed Binaries

	ftp://ftp.caldera.com/pub/updates/OpenUNIX/CSSA-2002-SCO.27


5.2 Verification

	MD5 (erg712071.pkg.Z) = 9e353b58860c1b2ab4e831410f44fa12

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


5.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following commands:

	Download erg712071.pkg.Z to the /var/spool/pkg directory

	# uncompress /var/spool/pkg/erg712071.pkg.Z
	# pkgadd -d /var/spool/pkg/erg712071.pkg


6. References

	Specific references for this advisory:
		none

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

This security fix closes Caldera incidents sr865661, fz521199
	and erg712071.


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.