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 			SCO Security Advisory

Subject:		UnixWare 7.1.3 UnixWare 7.1.4 : OpenSSL Potential SSL 2.0 Rollback Vulnerability
Advisory number:	SCOSA-2005.48
Issue date:		2005 November 15
Cross reference:	fz533160
 			CVE-2005-2969
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1. Problem Description

 	A vulnerability has been found in OpenSSL which potentially
 	affects applications that use the SSL/TLS server implementation
 	provided by OpenSSL.

 	Such applications are affected if they use the option
 	SSL_OP_MSIE_SSLV2_RSA_PADDING.  This option is implied by use of
 	SSL_OP_ALL, which is intended to work around various bugs in
 	third-party software that might prevent interoperability.  The
 	SSL_OP_MSIE_SSLV2_RSA_PADDING option disables a verification
 	step in the SSL 2.0 server supposed to prevent active
 	protocol-version rollback attacks.  With this verification step
 	disabled, an attacker acting as a "man in the middle" can force
 	a client and a server to negotiate the SSL 2.0 protocol even if
 	these parties both support SSL 3.0 or TLS 1.0.  The SSL 2.0
 	protocol is known to have severe cryptographic weaknesses and is
 	supported as a fallback only.

 	Applications using neither SSL_OP_MSIE_SSLV2_RSA_PADDING nor
 	SSL_OP_ALL are not affected.  Also, applications that disable
 	use of SSL 2.0 are not affected.

 	The Common Vulnerabilities and Exposures project (cve.mitre.org)
 	has assigned the name CVE-2005-2969 to this issue.


2. Vulnerable Supported Versions

 	System				Binaries
 	----------------------------------------------------------------------
 	UnixWare 7.1.3 			All earlier OpenSSL distributions
 	UnixWare 7.1.4 			All earlier OpenSSL distributions


3. Solution

 	The proper solution is to install the latest packages.


4. UnixWare 7.1.3

 	4.1 Location of Fixed Binaries

 	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.48


 	4.2 Verification

 	MD5 (openssl-0.9.7i.image) = 528a4e250fe58da796bf17c71b46c48b

 	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 openssl-0.9.7i.image to the /var/spool/pkg directory.

 	# pkgadd -d /var/spool/pkg/openssl-0.9.7i.image


5. UnixWare 7.1.4

 	5.1 Location of Fixed Binaries

 	ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.48


 	5.2 Verification

 	MD5 (openssl-0.9.7i.image) = 528a4e250fe58da796bf17c71b46c48b

 	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 openssl-0.9.7i.image to the /var/spool/pkg directory.

 	# pkgadd -d /var/spool/pkg/openssl-0.9.7i.image


6. References

 	Specific references for this advisory:
 		http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2969
 		http://www.openssl.org/news/secadv_20051011.txt

 	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 fz533160.


7. 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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