[Full-disclosure] 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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