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            Caldera International, Inc. Security Advisory

Subject: UnixWare 7: message catalog environment variable vulnerability
Advisory number: CSSA-2002-SCO.3
Issue date: 2002 February 7
Cross reference:
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1. Problem Description
        
        The library functions that manipulated message catalogs could
        be subverted via environment variables to use a user's own
        message catalogs, possibly causing a set{uid,gid} program to
        memory fault, allowing the possibility of a privilege
        escalation vulnerability.

2. Vulnerable Supported Versions

        Operating System Version Affected Files
        ------------------------------------------------------------------
        UnixWare 7 7.1.1 /usr/lib/libc.so.1

3. Workaround

        None.

4. UnixWare 7

  4.1 Location of Fixed Binaries

        ftp://stage.caldera.com/pub/security/unixware/CSSA-2002-SCO.3/

  4.2 Verification

        MD5 (erg711179.Z) = 89b893bc581c8b9601a95a9271268c47

        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:

        Download erg711179.Z to the /tmp directory

        # uncompress /tmp/erg711179.Z
        # pkgadd -d /tmp/erg711179

5. References

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

        This advisory addresses Caldera Security internal incidents
        sr859904, fz512992, erg711179.

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 would like to thank jggm JeGalGhongMyeung
        <jggmmail.com> for the discovery and research of this
        vulnerability.

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