Security Update: [CSSA-2002-SCO.40] OpenServer 5.0.5 OpenServer 5.0.6 : ypxfrd remote file access vulnerability

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                        SCO Security Advisory

Subject:                OpenServer 5.0.5 OpenServer 5.0.6 : ypxfrd remote file access vulnerability
Advisory number:        CSSA-2002-SCO.40
Issue date:             2002 October 10
Cross reference:
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1. Problem Description

        There is a vulnerability in ypxfrd that allows a local user
        (possibly remote) to read any file on a system running the
        daemon.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        OpenServer 5.0.5                /etc/ypxfrd
        OpenServer 5.0.6                /etc/ypxfrd


3. Solution

        The proper solution is to install the latest packages.


4. OpenServer 5.0.5

        4.1 Location of Fixed Binaries

        ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.40


        4.2 Verification

        MD5 (VOL.000.000) = 62683d366d60f0a4e61bc51c32355c6a

        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 commands:

        1) Download the VOL* files to the /tmp directory

        Run the custom command, specify an install from media images,
        and specify the /tmp directory as the location of the images.


5. OpenServer 5.0.6

        5.1 Location of Fixed Binaries

        ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.40


        5.2 Verification

        MD5 (VOL.000.000) = 62683d366d60f0a4e61bc51c32355c6a

        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 commands:

        1) Download the VOL* files to the /tmp directory

        Run the custom command, specify an install from media images,
        and specify the /tmp directory as the location of the images.


6. References

        Specific references for this advisory:
                http://www.kb.cert.org/vuls/id/538033
                http://isec.pl/vulnerabilities/0006.txt

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

        This security fix closes SCO incidents sr868669, fz525993,
        erg712121.


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.


8. Acknowledgements

        Janusz Niewiadomski <funkysh () isec pl> of iSEC Security
        Research discovered and researched this vulnerability.

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