SSRT3556 /usr/lbin/rwrite

From: Security Alert (
Date: 01/20/04

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    Date: 20 Jan 2004 12:26:46 -0700

    Hash: SHA1

     Originally issued: 20 January 2004
     SSRT3556 /usr/lbin/rwrite

    NOTICE: There are no restrictions for distribution of this
    Bulletin provided that it remains complete and intact.

    The information in the following Security Bulletin should be
    acted upon as soon as possible. Hewlett-Packard Company will
    not be liable for any consequences to any customer resulting
    from customer's failure to fully implement instructions in this
    Security Bulletin as soon as possible.

    PROBLEM: A locally exploitable buffer overflow has been
              identified in /usr/lbin/rwrite.

    IMPACT: Potential increase in privilege.

    PLATFORM: HP-UX B.11.00 and B.11.11.

    SOLUTION: Apply the appropriate patch:
              PHCO_29208 for HP-UX 11.00
              PHCO_29209 for HP-UX 11.11


    AVAILABILITY: All patches are available now on <>.
     A. Background
        A locally exploitable buffer overflow in /usr/lbin/rwrite has
        been discovered and repaired. It can cause a core dump with a
        segmentation violation.

        The SSRT thanks 'bt' of for reporting this
        potential vulnerability to HP.

        NOTE: This problem does not impact HP NonStop Servers,
              HP Tru64 UNIX/TruCluster Server, nor HP OpenVMS.


         The following is a list by HP-UX revision of
         affected filesets or patches and fix information.
         To determine if a system has an affected version,
         search the output of "swlist -a revision -l fileset"
         for an affected fileset or patch, then determine if
         a fixed revision or applicable patch is installed.

         HP-UX B.11.00
         fix: install PHCO_29208 or subsequent.

         HP-UX B.11.11
         fix: install PHCO_29209 or subsequent.


     B. Recommended solution
        Download from <> the appropriate patch mentioned

        Please note the Special Installation Instructions in the
        patch documentation:

          Special Installation Instructions:
              Run /usr/sbin/lpshut before the installation of this
              patch and run /usr/sbin/lpsched after installing the

        No reboot is required. These patches completely solve the
        identified problem.

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    (c)Copyright 2004 Hewlett-Packard Company
    Hewlett-Packard Company shall not be liable for technical or
    editorial errors or omissions contained herein. The information
    in this document is subject to change without notice.
    Hewlett-Packard Company and the names of HP products referenced
    herein are trademarks and/or service marks of Hewlett-Packard
    Company. Other product and company names mentioned herein may be
    trademarks and/or service marks of their respective owners.

    - --

    Version: PGP 8.0

    -----END PGP SIGNATURE-----

    Yours truly,
    HP S/W Security Team
    WTEC Cupertino, California

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