[Full-disclosure] SCOSA-2005.48 UnixWare 7.1.3 UnixWare 7.1.4 : OpenSSL Potential SSL 2.0 Rollback Vulnerability

[security@xxxxxxx]

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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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