UnixWare 7.1.4 UnixWare 7.1.3 : ppp buffer overflow

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                        SCO Security Advisory

Subject:                UnixWare 7.1.4 UnixWare 7.1.3 : ppp buffer overflow
Advisory number:        SCOSA-2005.41
Issue date:             2005 October 20
Cross reference:        sr894991 fz532994 erg712940 CAN-2005-2927
______________________________________________________________________________


1. Problem Description

        iDEFENSE has identified a Buffer Overflow vulnerability in
        SCO Unixware ppp prompt. Local exploitation of a buffer
        overflow vulnerability in the ppp binary, allows attackers 
        to gain root privileges. 

        This could lead to the execution of arbitrary code with root
        privileges, as ppp is setuid root by default. 

        The Common Vulnerabilities and Exposures project (cve.mitre.org) 
        has assigned the following name CAN-2005-2927 to this issue.

2. Vulnerable Supported Versions

        System                          Binaries
        ----------------------------------------------------------------------
        UnixWare 7.1.4                  /usr/bin/ppptalk
        UnixWare 7.1.3                  /usr/bin/ppptalk

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-2005.41

        4.2 Verification

        MD5 (erg712940.uw714.pkg.Z) = d47a9958e6dfd44c9b95e1d9489011f4

        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 erg712940.uw714.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712940.uw714.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712940.uw714.pkg


5. UnixWare 7.1.3

        5.1 Location of Fixed Binaries

        ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.41

        5.2 Verification

        MD5 (erg712940.uw713.pkg.Z) = 474799fc2cda9db5c486880599e1cdcc

        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 erg712940.uw713.pkg.Z to the /var/spool/pkg directory

        # uncompress /var/spool/pkg/erg712940.uw713.pkg.Z
        # pkgadd -d /var/spool/pkg/erg712940.uw713.pkg


6. References

        Specific references for this advisory:
                http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2927

        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 sr894991 fz532994
        erg712940.


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. Acknowledgments

        The SCO Group would like to thank iDefense for discovering and
        reporting this weakness.

______________________________________________________________________________

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