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	    Caldera International, Inc. Security Advisory

Subject:		OpenServer 5.0.5: nmap port scanner can kill inetd
Advisory number: 	CSSA-2001-SCO.33
Issue date: 		2001 November 15
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1. Problem Description
	
	The "nmap" port scanner can kill inetd if invoked with the -P0
	flag. 


2. Vulnerable Versions

	Operating System	Version		Affected Files
	------------------------------------------------------------------
	OpenServer		5.0.5		/etc/inetd


3. Workaround

	This problem is fixed in the OpenServer 5.0.6 product. If an
	OpenServer 5.0.6 machine is available, the inetd binary from
	it can be used on the OpenServer 5.0.5 machine.


4. OpenServer

  4.1 Location of Fixed Binaries

	ftp://stage.caldera.com/pub/security/openserver/CSSA-2001-SCO.33/


  4.2 Verification

	md5 checksums:

	43a9a473c59b6af8314504701f331a86	inetd.Z


	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 inetd.Z into the /tmp directory
	# cd /tmp
	# uncompress inetd.Z
	# mv /etc/inetd /etc/inetd-
	# chmod 0 /etc/inetd-
	# mv /tmp/inetd /etc
	# chown bin:bin /etc/inetd
	# chmod 711 /etc/inetd


5. References

	http://lists.insecure.org/nmap-hackers/2000/Jan-Mar/0073.html

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

	This advisory addresses Caldera Security internal incidents
	sr853144, SCO-236-1787, and erg711859.


6. 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.


	 
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