Security Update: [CSSA-2001-SCO.31] OpenServer: Sendmail debug input validation buffer overflow

[security-alert () caldera com]

To: bugtraq () securityfocus com announce () lists caldera com scoannmod () xenitec on ca

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            Caldera International, Inc. Security Advisory

Subject:                OpenServer: Sendmail debug input validation buffer overflow
Advisory number:        CSSA-2001-SCO.31
Issue date:             2001 November 7
Cross reference:
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1. Problem Description
        
        An input validation error exists in Sendmail's debugging
        functionality. This could be used by an unauthorized user to
        gain privilege.


2. Vulnerable Versions

        Operating System        Version         Affected Files
        ------------------------------------------------------------------
        OpenServer              5.0.4-5.0.6a    /usr/lib/sendmail


3. Workaround

        None.


4. OpenServer

  4.1 Location of Fixed Binaries

        ftp://stage.caldera.com/pub/security/openunix/CSSA-2001-SCO.31/


  4.2 Verification

        md5 checksums:
        
        d6fbe6e6ab98a0170c2d5029b4ade1bf        sendmail.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/lib/sendmail /usr/lib/sendmail.orig
        # chmod 0 /usr/lib/sendmail.orig
        # uncompress /tmp/sendmail.Z
        # cp /tmp/sendmail /usr/lib
        # chown root:bin /usr/lib/sendmail
        # chmod 4711 /usr/lib/sendmail


5. References

        http://www.securityfocus.com/archive/1/217901
        http://www.securityfocus.com/advisories/3583

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

        This advisory addresses Caldera Security internal incidents
        sr851246, SCO-559-1306, and erg711828.


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

        This vulnerability was discovered and researched by Cade
        Cairns <cairnsc () securityfocus com>.

         
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