Security Update: [CSSA-2003-SCO.3] UnixWare 7.1.1 Open UNIX 8.0.0 UnixWare 7.1.3 : ftp vulnerability with pipe symbols in filenames

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                        SCO Security Advisory

Subject:                UnixWare 7.1.1 Open UNIX 8.0.0 UnixWare 7.1.3 : ftp vulnerability with pipe symbols in filenames
Advisory number:        CSSA-2003-SCO.3
Issue date:             2003 March 03
Cross reference:
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1. Problem Description

        By using a filename with a | (pipe symbol) in it, shell
        commands can be issued remotely on the machine of a user
        who is retrieving files with the FTP client program, from
        a compromised or malicious ftp server. This leads to a
        compromise of the client machine.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        UnixWare 7.1.1                  /usr/bin/ftp
        Open UNIX 8.0.0                 /usr/bin/ftp
        UnixWare 7.1.3                  /usr/bin/ftp


3. Solution

        The proper solution is to install the latest packages.


4. UnixWare 7.1.1

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/CSSA-2003-SCO.3


        4.2 Verification

        MD5 (erg712227.pkg.Z) = 296bbcf1394f7010397b8d90f9a9978d

        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:

        Download erg712227.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712227.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712227.pkg


5. Open UNIX 8.0.0

        5.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/CSSA-2003-SCO.3


        5.2 Verification

        MD5 (erg712227.pkg.Z) = 296bbcf1394f7010397b8d90f9a9978d

        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:

        Download erg712227.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712227.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712227.pkg


6. UnixWare 7.1.3

        6.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/CSSA-2003-SCO.3


        6.2 Verification

        MD5 (erg712227.pkg.Z) = 296bbcf1394f7010397b8d90f9a9978d

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


        6.3 Installing Fixed Binaries

        Upgrade the affected binaries with the following sequence:

        Download erg712227.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712227.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712227.pkg


7. References

        Specific references for this advisory:

                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0041

        SCO security resources:

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

        This security fix closes SCO incidents sr874929, fz527425,
        erg712227.


8. 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.


9. Acknowledgements

        This vulnerability was first published in 1997 on Bugtraq,
        and was discovered again by The Hackademy Audit team in
        September 2002 during a source code audit.

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