Security Update: [CSSA-2002-SCO.20] OpenServer 5.0.5 OpenServer 5.0.6 : popper buffer overflow and denial-of-service

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                Caldera International, Inc.  Security Advisory

Subject:                OpenServer 5.0.5 OpenServer 5.0.6 : popper buffer overflow and denial-of-service
Advisory number:        CSSA-2002-SCO.20
Issue date:             2002 May 22
Cross reference:
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1. Problem Description

        /etc/popper will go into a loop if a character string of
        length 2048 (or more) is sent to it.

        If the bulldir variable in the user's config file is longer
        than 256 characters, popper will memory fault.


2. Vulnerable Supported Versions

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


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.20


        4.2 Verification

        MD5 (VOL.000.000) = f2746cddde194cb93e5ad1b41637a75c

        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.20


        5.2 Verification

        MD5 (VOL.000.000) = f2746cddde194cb93e5ad1b41637a75c

        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 sr863699, fz520822,
        erg712033.


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

        Marcell Fodor reported the memory fault issue. Dustin Childers
        reported the denial-of-service issue.

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