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	    Caldera International, Inc. Security Advisory

Subject:		Open UNIX, UnixWare 7: snmpd memory fault vulnerabilities
Advisory number: 	CSSA-2002-SCO.4
Issue date: 		2002 February 12
Cross reference:
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1. Problem Description
	
	The University of Oulu (Finland) wrote approximately 53000
	tests for snmpd error conditions.  For Open UNIX and UnixWare,
	94 of the tests caused snmpd to memory fault. This could lead
	to denial-of-service attacks, or possible local and remote
	root acquisition.


2. Vulnerable Supported Versions

	Operating System	Version		Affected Files
	------------------------------------------------------------------
	Open UNIX		8.0.0		/usr/lib/libsnmp.so
	UnixWare 7		7.1.1		/usr/lib/libsnmp.so
	UnixWare 7		7.1.0		/usr/lib/libsnmp.so


3. Workaround

	If snmp is not a needed service:

	add an 'exit 0' statement (without the single quotes) as the
	first executable line of /etc/rc2.d/S73snmp,

		-or-

	remove the execute bits from the in.snmpd binary,

		# chmod 0 /usr/sbin/in.snmpd


4. Open UNIX 8.0.0

  4.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/openunix/CSSA-2002-SCO.4/


  4.2 Verification

	MD5 (erg711937.Z) = 62f81d5f7e0c5e0f4a2704e015d37fc4


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


  4.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following commands:

	Download erg711937.Z to the /tmp directory

	# uncompress /tmp/erg711937.Z
	# pkgadd -d /tmp/erg711937


5. UnixWare 7.1.1

  5.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/openunix/CSSA-2002-SCO.4/


  5.2 Verification

	MD5 (erg711937b.Z) = 09b8dbdb080e5588c6f61669ea914af7


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


  5.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following commands:

	Download erg711937b.Z to the /tmp directory

	# uncompress /tmp/erg711937b.Z
	# pkgadd -d /tmp/erg711937b


6. UnixWare 7.1.0

  6.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/openunix/CSSA-2002-SCO.4/


  6.2 Verification

	MD5 (erg711937c.Z) = f15696cfc2b9f0afc1b0432bb311151a


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


  6.3 Installing Fixed Binaries

	Upgrade the affected binaries with the following commands:

	Download erg711937c.Z to the /tmp directory

	# uncompress /tmp/erg711937c.Z
	# pkgadd -d /tmp/erg711937c


7. References

	http://www.cert.org/advisories/CA-2002-03.html


	This and other advisories are located at
		http://stage.caldera.com/support/security

	This advisory addresses Caldera Security internal incidents
	sr858479, fz519781, erg711937.


8. Disclaimer

	Caldera International, Inc. is not responsible for the misuse
	of any of the information we provide on our website and/or
	through our security advisories. Our advisories are a service
	to our customers intended to promote secure installation and
	use of Caldera International products.


9. Acknowledgements

	This vulnerability was discovered and researched by the
	University of Oulu (oulu.fi).


	 
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