UnixWare 7.1.4 UnixWare 7.1.3 UnixWare 7.1.1 : wu-ftp denial of service

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                        SCO Security Advisory

Subject:                UnixWare 7.1.4 UnixWare 7.1.3 UnixWare 7.1.1 : wu-ftp denial of service
Advisory number:        SCOSA-2005.28
Issue date:             2005 June 06
Cross reference:        sr893935 fz532336 erg712855 CAN-2005-0256
______________________________________________________________________________


1. Problem Description

        The wu_fnmatch function in wu_fnmatch.c for wu-fptd 2.6.1
        and 2.6.2 allows remote attackers to cause a denial of
        service (CPU exhaustion by recursion) via a glob pattern
        with a large number of SCOSA-2005.28.in SCOSA-2005.28.txt
        erg712855.711.pkg.Z erg712855.711.txt erg712855.713.pkg.Z
        erg712855.713.txt (wildcard) characters, as demonstrated
        using the dir copmmand. 

        The Common Vulnerabilities and Exposures project (cve.mitre.org) 
        has assigned the following name CAN-2005-0256 to this issue.


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        UnixWare 7.1.4                  /usr/sbin/in.ftpd
        UnixWare 7.1.3                  /usr/sbin/in.ftpd
        UnixWare 7.1.1                  /usr/sbin/in.ftpd


3. Solution

        The proper solution is to install the latest packages.

4. UnixWare 7.1.4

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.28

        4.2 Verification

        MD5 (erg712855.714.pkg.Z) = e774fb3a1e9be5ad88f961b95362e25c  
        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 erg712855.713.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712855.713.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712855.713.pkg


5. UnixWare 7.1.3

        5.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.28

        5.2 Verification

        MD5 (erg712855.713.pkg.Z) = 60aeba73dbb57e4979c36e222340cdc6

        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 erg712855.713.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712855.713.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712855.713.pkg


6. UnixWare 7.1.1

        6.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.28

        6.2 Verification

        MD5 (erg712855.711.pkg.Z) = c7dd29c7fb98756a9c8e5fa0eff5e177

        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 erg712855.711.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712855.711.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712855.711.pkg


7. References

        Specific references for this advisory:
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0256 
                http://www.idefense.com/application/poi/display?id=207&type=vulnerabilities

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

        SCO security advisories via email
                http://www.sco.com/support/forums/security.html

        This security fix closes SCO incidents sr893935 fz532336
        erg712855.


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. Acknowledgments

        SCO would like to thank Adam Zabrocki

______________________________________________________________________________

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