Security Update: [CSSA-2002-SCO.1] OpenServer: wu-ftpd ftpglob() vulnerability

[security () caldera com]

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            Caldera International, Inc. Security Advisory

Subject:                OpenServer: wu-ftpd ftpglob() vulnerability
Advisory number:        CSSA-2002-SCO.1
Issue date:             2002 January 10
Cross reference:
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1. Problem Description
        
        A vulnerability in the wu-ftpd ftpglob() function was found by
        the CORE ST team.  This vulnerability can be exploited to
        obtain root access on the ftp server.


2. Vulnerable Versions

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


3. Workaround

        None.


4. OpenServer

  4.1 Location of Fixed Binaries

        ftp://stage.caldera.com/pub/security/openserver/CSSA-2002-SCO.1/


  4.2 Verification

        MD5 (erg711907.tar) = 577a93a058d37283037be476b9e54298


        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:

        Download erg711907.tar to /tmp

        # cd /tmp
        # tar xvf erg711907.tar
        # custom

        Instruct custom to install from images, and supply /tmp as the
        directory of the VOL images.
               

5. References

        CORE-20011001: Wu-FTP glob heap corruption vulnerability
        http://www.corest.com

        CERT Advisory CA-2001-33 Multiple Vulnerabilities in WU-FTPD
        http://www.cert.org     

        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0550

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

        This advisory addresses Caldera Security internal incidents
        sr856022, SCO-559-1331, erg711907.


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 originally reported by Matt Power of
        BindView on the vuln-dev mailing list.

         
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