November 2005
SCO Security Advisory - UnixWare 7.1.3 UnixWare 7.1.4 : OpenSSL Potential SSL 2.0 Rollback Vulnerability
ID: 01031
Ref: 968/2005
Date: 18 November 2005:13:43:57
Version: 1
Title: SCO Security Advisory - UnixWare 7.1.3 UnixWare 7.1.4 : OpenSSL Potential SSL 2.0 Rollback Vulnerability
Abstract: A vulnerability has been found in OpenSSL which potentially affects applications that use the SSL/TLS server implementation provided by OpenSSL.
Vendors affected: SCO
Operating systems affected: SCO
Applications affected: SCO
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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
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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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