UnixWare 7.1.3 Open UNIX 8.0.0 UnixWare 7.1.1 : CDE libDtHelp buffer overflow

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                        SCO Security Advisory

Subject:                UnixWare 7.1.3 Open UNIX 8.0.0 UnixWare 7.1.1 : CDE libDtHelp buffer overflow
Advisory number:        CSSA-2003-SCO.31
Issue date:             2003 October 31
Cross reference:        sr885326 fz528372 erg712445 CAN-2003-083 CERT VU#575804
______________________________________________________________________________


1. Problem Description

        The Common Desktop Environment (CDE) is a standard desktop
        environment for UNIX based systems. CDE libDTHelp contains
        a buffer overflow that can be exploited by a local user
        using specially crafted environment variables.
        
        An authenticated local user may be able to execute arbitrary
        code with root privileges. There is a possibility that a
        user can set the crafted environment variable to gain
        elevated privileges during initialization of the dtHelp
        application, or applications which link to libtDtHelp.

        The Common Vulnerabilities and Exposures project (cve.mitre.org)
        has assigned the name CAN-2003-0834 to this issue. CERT has
        assigned the name VU#575804 to this issue


2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        UnixWare 7.1.3          /usr/dt/lib/libDtHelp.so.1
        Open UNIX 8.0.0         /usr/dt/lib/libDtHelp.so.1
        UnixWare 7.1.1          /usr/dt/lib/libDtHelp.so.1


3. Solution

        The proper solution is to install the latest packages.


4. UnixWare 7.1.3 / Open UNIX 8.0.0 / UnixWare 7.1.1

        4.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/CSSA-2003-SCO.31


        4.2 Verification

        MD5 (erg712445.pkg.Z) = ecd4aaba3c6d0f7a22b7d2812fc9a174

        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 erg712445.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712445.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712445.pkg


5. References

        Specific references for this advisory:
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0834 
                http://www.kb.cert.org/vuls/id/575804

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

        This security fix closes SCO incidents sr885326 fz528372
        erg712445.


6. 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.


7. Acknowledgments

        SCO would like to thank Kevin Kotas from Computer Associates
        Intl. eTrust eVM

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