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                Caldera International, Inc. Security Advisory

Subject: OpenServer 5.0.5 OpenServer 5.0.6 : scoadmin command creates temporary files insecurely
Advisory number: CSSA-2002-SCO.22
Issue date: 2002 May 28
Cross reference:
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1. Problem Description

        The scoadmin command creates and uses temporary files
        insecurely. Names can be predicted, and spoofed with symbolic
        links.

2. Vulnerable Supported Versions

        System Binaries
        ----------------------------------------------------------------------
        OpenServer 5.0.5 /etc/sysadm.d/lib/sysadm.tlib
                                        /etc/sysadm.d/lib/sysadm.tndx
        OpenServer 5.0.6 /etc/sysadm.d/lib/sysadm.tlib
                                        /etc/sysadm.d/lib/sysadm.tndx

3. Solution

        The proper solution is to install the latest packages.

4. OpenServer 5.0.5

        4.1 Location of Fixed Binaries

        ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.22

        4.2 Verification

        MD5 (VOL.000.000) = 814cc4af8e653baf220f2a94b23ff741

        md5 is available for download from
                ftp://stage.caldera.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://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.22

        5.2 Verification

        MD5 (VOL.000.000) = 814cc4af8e653baf220f2a94b23ff741

        md5 is available for download from
                ftp://stage.caldera.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:
                none

        Caldera UNIX security resources:
                http://stage.caldera.com/support/security/

        Caldera OpenLinux security resources:
                http://www.caldera.com/support/security/index.html

        This security fix closes Caldera incidents sr847944,
        SCO-1-233, erg711739.

7. Disclaimer

        Caldera International, Inc. 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 Caldera products.

8. Acknowledgements

        Kevin Finisterre (dotslashsnosoft.com) discovered and
        researched this vulnerability.

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