AUSCERT External Security Bulletin Redistribution
                   Security Vulnerability with rpc.pcnfsd
                              09 February 1999


Hewlett Packard has issued the following bulletin concerning a vulnerability 
with rpc.pcnfsd.  rpc.pcnfsd has an error in its use of the spool directory
which may allow remote and local users to gain root access.

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Digest Name:  Daily Security Bulletins Digest
    Created:  Mon Feb  8  3:00:02 PST 1999

Table of Contents:

Document ID      Title
- ---------------  -----------
HPSBUX9902-091   Security Vulnerability with rpc.pcnfsd

The documents are listed below.
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Document ID:  HPSBUX9902-091
Date Loaded:  19990207
      Title:  Security Vulnerability with rpc.pcnfsd

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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.

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PROBLEM:  rpc.pcnfsd has an error in its use of the spool directory

PLATFORM: HP 9000 series 700/800.

DAMAGE:   Remote and local users can compromise root access.

SOLUTION: Install _all_ applicable patches listed below.  Reboot required.

AVAILABILITY:  All patches are available now.

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   A. Background
      rpc.pcnfsd is a remote procedure call used by NFS clients which is
      a service providing username and password authentication for system
      which have NFS client software installed.
      If exploited, this defect allows the main printer spool directory
      used by rpc.pcnfsd to be made world writeable.

   B. Fixing the problem
      This involves installing a series of patches which require
      rebooting the system.  The main patch requires a libc patch,
      which in turn requires a kernal patch.

        For HP-UX 10.01:                        PHNE_17248
        For HP-UX 10.10:                        PHNE_17248
        For HP-UX 10.20:                        PHNE_17098
        For HP-UX 11.00:                        PHNE_16470

      The following sets of patches will need to be installed to resolve
      all the documented patch dependencies.  The dependencies will be
      satisfied by the patches listed, or any patch that supersedes them:

        s700 10.01:     PHNE_17248, PHKL_7059,  PHCO_14253;
        s800 10.01:     PHNE_17248, PHKL_7060,  PHCO_14253;
        s700 10.10:     PHNE_17248, PHKL_8292,  PHCO_14254;
        s800 10.10:     PHNE_17248, PHKL_8293,  PHCO_14254;
        s700 10.20:     PHNE_17098, PHKL_9155,  PHKL_16750,
                        PHCO_13777, PHCO_12922, PHCO_17389,
                        PHNE_16237, PHKL_16959, PHKL_17012,
                        PHKL_17253, PHKL_12007;
        s800 10.20:     PHNE_17098, PHKL_9156,  PHKL_16751,
                        PHCO_13777, PHCO_12922, PHCO_17389,
                        PHNE_17097, PHKL_16957, PHKL_17013,
                        PHKL_17254, PHKL_12008;
        s700 11.00:     PHNE_16470, PHCO_16629, PHKL_15689,
        s800 11.00:     PHNE_16470, PHCO_16629, PHKL_15689,

      NOTE: This problem is fixed fully in HP-UX release 11.01.

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- -----End of Document ID:  HPSBUX9902-091--------------------------------------

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