Security Update: [CSSA-2003-SCO.9] OpenServer 5.0.5 OpenServer 5.0.6 : Buffer overflows and other security vulnerabilities in Squid

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                        SCO Security Advisory

Subject:                OpenServer 5.0.5 OpenServer 5.0.6 : Buffer overflows and other security vulnerabilities in Squid
Advisory number:        CSSA-2003-SCO.9
Issue date:             2003 May 27
Cross reference:
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1. Problem Description

         Vulnerability in Squid related to proxy authentication
         credentials may allow remote web sites to obtain the user's
         proxy login and password.

         FTP proxy in Squid does not compare the IP addresses of
         control and data connections with the FTP server, which
         allows remote attackers to bypass firewall rules or spoof FTP
         server responses.

         Buffer overflows in Squid allow remote attackers to cause a
         denial of service (crash) and possibly execute arbitrary code
         (1) via the MSNT auth helper (msnt_auth) when using denyusers
         or allowusers files, (2) via the gopher client, or (3) via
         the FTP server directory listing parser when HTML output is
         generated.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        OpenServer 5.0.5                Squid distribution
        OpenServer 5.0.6                Squid distribution


3. Solution

        The proper solution is to install the latest packages.


4. OpenServer 5.0.5

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/OpenServer/CSSA-2003-SCO.9


        4.2 Verification

        MD5 (VOL.000.000) = a4abc782d87415df7369a0483e3b1554
        MD5 (VOL.000.001) = d91c192ac5ec45fe609d5a58fdf736b5
        MD5 (VOL.000.002) = af55795c6ebbe9012c9eb5d8b2f6e57a
        MD5 (VOL.000.003) = c5a74b7f6ab24a311b2fc24f01740ffe

        md5 is available for download from
                ftp://ftp.sco.com/pub/security/tools


        4.3 Installing Fixed Binaries

        Upgrade the affected binaries with the following sequence:

        1) Download the VOL* files to the /tmp directory

        2) 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.sco.com/pub/updates/OpenServer/CSSA-2003-SCO.9


        5.2 Verification

        MD5 (VOL.000.000) = a4abc782d87415df7369a0483e3b1554
        MD5 (VOL.000.001) = d91c192ac5ec45fe609d5a58fdf736b5
        MD5 (VOL.000.002) = af55795c6ebbe9012c9eb5d8b2f6e57a
        MD5 (VOL.000.003) = c5a74b7f6ab24a311b2fc24f01740ffe

        md5 is available for download from
                ftp://ftp.sco.com/pub/security/tools


        5.3 Installing Fixed Binaries

        Upgrade the affected binaries with the following sequence:

        1) Download the VOL* files to the /tmp directory

        2) 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://www.squid-cache.org/Advisories/SQUID-2002_3.txt
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0714
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0713
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0715

        SCO security resources:

                http://www.sco.com/support/security/index.html

        This security fix closes SCO incidents sr866632, fz521515,
        erg501628.


7. Disclaimer

        SCO 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 SCO
        products.


8. Acknowledgements

        The Squid Team discovered and researched these vulnerabilities.

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