To: bugtraqsecurityfocus.com announcelists.caldera.com scoannmodxenitec.on.ca

___________________________________________________________________________

            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:
___________________________________________________________________________

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 <cairnscsecurityfocus.com>.

         
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