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            Caldera International, Inc. Security Advisory

Subject: Open Unix, UnixWare 7: dtaction argument buffer overflow
Advisory number: CSSA-2001-SCO.21
Issue date: 2001 October 1
Cross reference:
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1. Problem Description
        
        Very long arguments to the dtaction command cause an argument
        buffer overflow. This could be used by an unauthorized user
        to gain privilege.

2. Vulnerable Versions

        Operating System Version Affected Files
        ------------------------------------------------------------------
        UnixWare 7 All /usr/dt/bin/dtaction
        Open Unix 8.0.0 /usr/dt/bin/dtaction

3. Workaround

        None.

4. UnixWare 7

  4.1 Location of Fixed Binaries

        ftp://stage.caldera.com/pub/security/openunix/CSSA-2001-SCO.21/

  4.2 Verification

        md5 checksums:
        
        73300a4b513babf273c56ff67a4ff60e dtaction.Z

        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:

        # mv /usr/dt/bin/dtaction /usr/dt/bin/dtaction-
        # uncompress /tmp/dtaction.Z
        # cp dtaction /usr/dt/bin
        # cd /usr/dt/bin
        # chown root dtaction
        # chgrp sys dtaction
        # chmod 6555 dtaction

5. References

        This and other advisories are located at
                http://stage.caldera.com/support/security

        This advisory addresses Caldera Security internal incident
        sr847409.

6. Disclaimer

        Caldera International, Inc. is not responsible for the misuse
        of any of the information we provide on our website and/or
        through our security advisories. Our advisories are a service
        to our customers intended to promote secure installation and
        use of Caldera International products.

7. Acknowledgements

        Caldera International wishes to thank KF <dotslashsnosoft.com>
        for discovering and reporting this problem.

         
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