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                Caldera International, Inc. Security Advisory

Subject: UnixWare 7.1.1 Open UNIX 8.0.0 : REVISED: rpc.ttdbserverd file creation/deletion and buffer overflow vulnerabilities
Advisory number: CSSA-2002-SCO.28.1
Issue date: 2002 August 19
Cross reference:
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1. Problem Description

        Several security bugs were discovered in the rpc.ttdbserverd
        program that allow an attacker to overwrite memory in the
        program as well as force the program to create and delete
        arbitrary files on the system. Some of these vulnerabilities
        are remotely exploitable.

        This update adds a fix for an additional vulnerability: a
        buffer overflow described by CERT CA-2002-26.

2. Vulnerable Supported Versions

        System Binaries
        ----------------------------------------------------------------------
        UnixWare 7.1.1 /usr/dt/bin/rpc.ttdbserverd
        Open UNIX 8.0.0 /usr/dt/bin/rpc.ttdbserverd

3. Solution

        The proper solution is to install the latest packages.

4. UnixWare 7.1.1

        4.1 Location of Fixed Binaries

        ftp://ftp.caldera.com/pub/updates/OpenUNIX/CSSA-2002-SCO.28.1

        4.2 Verification

        MD5 (erg712073.pkg.Z) = c743fbce3e57a8dd07f417320ff5b3ab

        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:

        Download erg712073.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712073.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712073.pkg

5. Open UNIX 8.0.0

        5.1 Location of Fixed Binaries

        ftp://ftp.caldera.com/pub/updates/OpenUNIX/CSSA-2002-SCO.28.1

        5.2 Verification

        MD5 (erg712073.pkg.Z) = c743fbce3e57a8dd07f417320ff5b3ab

        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:

        Download erg712073.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712073.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712073.pkg

6. References

        Specific references for this advisory:

                CORE ST advisory CORE-20020528
                http://www.cert.org/advisories/CA-2002-20.html

                http://www.entercept.com/news/uspr/08-12-02.asp
                http://www.cert.org/advisories/CA-2002-26.html
                http://www.kb.cert.org/vuls/id/387387
                http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0679

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

        This security fix closes Caldera incidents sr865685, fz521202,
        erg712073.

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

        The file creation and deletion vulnerabilities were discovered
        and researched by Ricardo Quesada of the CORE IMPACT team at
        CORE Security Technologies. Sinan Eren of the Entercept
        Richochet Team reported the CA-2002-26 vulnerability.

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