Security Update: [CSSA-2002-SCO.33] OpenServer 5.0.5 OpenServer 5.0.6 : timed does not enforce nulls

From: security@caldera.com
Date: 07/16/02 

To: bugtraq@securityfocus.com, announce@lists.caldera.com, scoannmod@xenitec.on.ca
From: security@caldera.com
Date: Mon, 15 Jul 2002 17:05:04 -0700

To: bugtraq@securityfocus.com announce@lists.caldera.com scoannmod@xenitec.on.ca

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                Caldera International, Inc. Security Advisory

Subject: OpenServer 5.0.5 OpenServer 5.0.6 : timed does not enforce nulls
Advisory number: CSSA-2002-SCO.33
Issue date: 2002 July 15
Cross reference:
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1. Problem Description

        The timed program does not enforce null-termination of
        strings in certain situations. It is possible that this
        could be used by a malicious user to perform a remote
        denial-of-service attack.

2. Vulnerable Supported Versions

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

3. Solution

        The proper solution is to install the latest packages.

4. OpenServer 5.0.5

        4.1 Location of Fixed Binaries

        ftp://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.33

        4.2 Verification

        MD5 (VOL.000.000) = 8f818406b55b806e10b05c3647517265

        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:

        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://ftp.caldera.com/pub/updates/OpenServer/CSSA-2002-SCO.33

        5.2 Verification

        MD5 (VOL.000.000) = 8f818406b55b806e10b05c3647517265

        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:

        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:
                http://xforce.iss.net/static/6228.php
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0388

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

        This security fix closes Caldera incidents sr855195,
        SCO-559-1321, erg711889.

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

        This vulnerability was discovered and researched by David
        A. Holland <dholland@www.linux.org.uk>.

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