Security Update: [CSSA-2002-SCO.35] OpenServer 5.0.5 OpenServer 5.0.6 : crontab format string vulnerability

[security () caldera com]

To: bugtraq () securityfocus com announce () lists caldera com scoannmod () xenitec on ca

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                Caldera International, Inc.  Security Advisory

Subject:                OpenServer 5.0.5 OpenServer 5.0.6 : crontab format string vulnerability
Advisory number:        CSSA-2002-SCO.35
Issue date:             2002 July 22
Cross reference:
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1. Problem Description

        The crontab program contains a format string vulnerability
        that can be used by a malicious user to execute code to
        gain privilege.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        OpenServer 5.0.5                /etc/cron
                                        /usr/bin/at
                                        /usr/bin/crontab
        OpenServer 5.0.6
                                        /etc/cron
                                        /usr/bin/at
                                        /usr/bin/crontab


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.35


        4.2 Verification

        MD5 (VOL.000.000) = 044edeae4a5db58a5a27078d70bf2060

        md5 is available for download from
                ftp://ftp.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://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.35


        5.2 Verification

        MD5 (VOL.000.000) = 044edeae4a5db58a5a27078d70bf2060

        md5 is available for download from
                ftp://ftp.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:
                Strategic Reconnaissance Team Security Advisory
                        (SRT2002-06-04-1611) http://www.snosoft.com

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

        This security fix closes Caldera incidents sr864228, fz520964,
        erg712045.


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

        KF (dotslash () snosoft com) discovered and researched this
        vulnerability.

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