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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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