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                        SCO Security Advisory

Subject: Linux: lynx CRLF injection vulnerability
Advisory number: CSSA-2002-049.0
Issue date: 2002 November 18
Cross reference:
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1. Problem Description

        If lynx is given a url with some special characters on
        the command line, it will include faked headers in the HTTP
        query. This feature can be used to force scripts (that use Lynx
        for downloading files) to access the wrong site on a web server
        with multiple virtual hosts.

2. Vulnerable Supported Versions

        System Package
        ----------------------------------------------------------------------

        OpenLinux 3.1.1 Server prior to lynx-2.8.4-1.i386.rpm

        OpenLinux 3.1.1 Workstation prior to lynx-2.8.4-1.i386.rpm

        OpenLinux 3.1 Server prior to lynx-2.8.4-1.i386.rpm

        OpenLinux 3.1 Workstation prior to lynx-2.8.4-1.i386.rpm

3. Solution

        The proper solution is to install the latest packages. Many
        customers find it easier to use the Caldera System Updater, called
        cupdate (or kcupdate under the KDE environment), to update these
        packages rather than downloading and installing them by hand.

4. OpenLinux 3.1.1 Server

        4.1 Package Location

        ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Server/CSSA-2002-049.0/RPMS

        4.2 Packages

        86aa0c385c7b4789aa33fe57dc209490 lynx-2.8.4-1.i386.rpm

        4.3 Installation

        rpm -Fvh lynx-2.8.4-1.i386.rpm

        4.4 Source Package Location

        ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Server/CSSA-2002-049.0/SRPMS

        4.5 Source Packages

        2b48e8130471668d9562fc10a5969d02 lynx-2.8.4-1.src.rpm

5. OpenLinux 3.1.1 Workstation

        5.1 Package Location

        ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-2002-049.0/RPMS

        5.2 Packages

        bd467354192cc42c87abb4be5650749f lynx-2.8.4-1.i386.rpm

        5.3 Installation

        rpm -Fvh lynx-2.8.4-1.i386.rpm

        5.4 Source Package Location

        ftp://ftp.sco.com/pub/updates/OpenLinux/3.1.1/Workstation/CSSA-2002-049.0/SRPMS

        5.5 Source Packages

        cf32748b277276e5f43a6f4111bb1ff2 lynx-2.8.4-1.src.rpm

6. OpenLinux 3.1 Server

        6.1 Package Location

        ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Server/CSSA-2002-049.0/RPMS

        6.2 Packages

        02bb0b77cf7f6014c6ad5a386e5bc763 lynx-2.8.4-1.i386.rpm

        6.3 Installation

        rpm -Fvh lynx-2.8.4-1.i386.rpm

        6.4 Source Package Location

        ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Server/CSSA-2002-049.0/SRPMS

        6.5 Source Packages

        61828e229e2794c46376c95354c8859c lynx-2.8.4-1.src.rpm

7. OpenLinux 3.1 Workstation

        7.1 Package Location

        ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Workstation/CSSA-2002-049.0/RPMS

        7.2 Packages

        d0b3580c93c3790d88eb0c4d18a75e58 lynx-2.8.4-1.i386.rpm

        7.3 Installation

        rpm -Fvh lynx-2.8.4-1.i386.rpm

        7.4 Source Package Location

        ftp://ftp.sco.com/pub/updates/OpenLinux/3.1/Workstation/CSSA-2002-049.0/SRPMS

        7.5 Source Packages

        2c321eabba1a1d8172893de42f58af59 lynx-2.8.4-1.src.rpm

8. References

        Specific references for this advisory:
                none

        SCO security resources:
                http://www.sco.com/support/security/index.html

        This security fix closes SCO incidents sr868660, fz525986,
        erg712118.

9. 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.

10. Acknowledgements

        SCO would like to thank Ulf Harnhammar for the discovery and
        analysis of this vulnerability.

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