bugtraq - UnixWare 7.1.4 UnixWare 7.1.3 UnixWare 7.1.1 : telnet client multiple issues

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Date: Fri, 8 Apr 2005 12:40:27 -0700
From: please_reply_to_security@....com
To: security-announce@...t.sco.com, bugtraq@...urityfocus.com,
	full-disclosure@...ts.netsys.com
Subject: UnixWare 7.1.4 UnixWare 7.1.3 UnixWare 7.1.1 : telnet client multiple issues



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______________________________________________________________________________

			SCO Security Advisory

Subject:		UnixWare 7.1.4 UnixWare 7.1.3 UnixWare 7.1.1 : telnet client multiple issues
Advisory number: 	SCOSA-2005.21
Issue date: 		2005 April 08
Cross reference:	sr893210 fz531446 erg712801 CAN-2005-0469 CAN-2005-0468
______________________________________________________________________________


1. Problem Description

	Buffer overflow in the slc_add_reply function in various
	BSD-based Telnet clients, when handling LINEMODE suboptions,
	allows remote attackers to execute arbitrary code via a
	reply with a large number of Set Local Character (SLC)
	commands. 

	The Common Vulnerabilities and Exposures project (cve.mitre.org) 
	has assigned the name CAN-2005-0469 to this issue. 

	Heap-based buffer overflow in the env_opt_add function
	in telnet.c for various BSD-based Telnet clients allows
	remote attackers to execute arbitrary code via responses
	that contain a large number of characters that require
	escaping, which consumers more memory than allocated. 
	
	The Common Vulnerabilities and Exposures project (cve.mitre.org)
	has assigned the name CAN-2005-0468 to this issue.


2. Vulnerable Supported Versions

	System				Binaries
	----------------------------------------------------------------------
	UnixWare 7.1.4 			/usr/bin/telnet
	UnixWare 7.1.3 			/usr/bin/telnet
	UnixWare 7.1.1 			/usr/bin/telnet


3. Solution

	The proper solution is to install the latest packages.


4. UnixWare 7.1.4

	4.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.21

	4.2 Verification

	MD5 (erg712801.714.pkg.Z) = bf53673ea12a1c25e3606a5b879adbc4

	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 erg712801.714.pkg.Z to the /var/spool/pkg directory

	# uncompress /var/spool/pkg/erg712801.714.pkg.Z
	# pkgadd -d /var/spool/pkg/erg712801.714.pkg


5. UnixWare 7.1.3

	5.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.21

	5.2 Verification

	MD5 (erg712801.713.pkg.Z) = e876b261afbecb41c18c26d6ec11e71d

	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 erg712801.713.pkg.Z to the /var/spool/pkg directory

	# uncompress /var/spool/pkg/erg712801.713.pkg.Z
	# pkgadd -d /var/spool/pkg/erg712801.713.pkg


6. UnixWare 7.1.1

	6.1 Location of Fixed Binaries

	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.21

	6.2 Verification

	MD5 (erg712801.711.pkg.Z) = f3099416a793c1f731bc7e377fe0e4a2

	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 erg712801.711.pkg.Z to the /var/spool/pkg directory

	# uncompress /var/spool/pkg/erg712801.711.pkg.Z
	# pkgadd -d /var/spool/pkg/erg712801.711.pkg


7. References

	Specific references for this advisory:
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0468 
		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0469 
		http://www.idefense.com/application/poi/display?id=221&type=vulnerabilities 
		http://www.idefense.com/application/poi/display?id=220&type=vulnerabilities

	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 sr893210 fz531446
	erg712801.


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.


9. Acknowledgments

	SCO would like to thank Gal Delalleau and iDEFENSE

______________________________________________________________________________

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