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From: sco-securitycaldera.com
Date: Thu Jul 26 2001 - 12:48:07 CDT

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    To: announcelists.caldera.com bugtraqsecurityfocus.com security-announcelists.securityportal.com


                Caldera International, Inc. Security Advisory

    Subject: OpenServer: /etc/popper buffer overflow
    Advisory number: CSSA-2001-SCO.8
    Issue date: 2001 July 26
    Cross reference:

    1. Problem Description
            The popper daemon /etc/popper was subject to a buffer overflow
            that could be used by a malicious user.

    2. Vulnerable Versions

            Operating System Version Affected Files
            OpenServer <= 5.0.6a /etc/popper

    3. Workaround


    4. OpenServer

      4.1 Location of Fixed Binaries


      4.2 Verification

            md5 checksums:
            8795253219fbcbba3027f0c37f6a884e popper.Z

            md5 is available for download from


      4.3 Installing Fixed Binaries

            Upgrade the affected binaries with the following commands:

            # uncompress /tmp/popper.Z
            # mv /etc/popper /etc/popper.old
            # cp /tmp/popper /etc
            # chown bin /etc/popper
            # chgrp bin /etc/popper
            # chmod 755 /etc/popper

    5. References


    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.


            Caldera International wishes to thank Gustavo Viscaino for
            originally finding the problem, Michael Brennen
            <mbrennenfni.com> for forwarding the problem report from the
            qpopper list, and the folks at Qualcomm for fixing the

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