Published:
08 February 1999
Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-1999.013 -- HEWLETT-PACKARD SECURITY BULLETIN: HPSBUX9902-091
Security Vulnerability with rpc.pcnfsd
09 February 1999
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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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HP Support Information Digests
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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
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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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HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #00091, 08 Febraury 1999
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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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I.
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,
PHCO_14625;
s800 11.00: PHNE_16470, PHCO_16629, PHKL_15689,
PHCO_14625.
NOTE: This problem is fixed fully in HP-UX release 11.01.
C. To subscribe to automatically receive future NEW HP Security
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mail, do the following:
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Once in the archive there is another link to our current Security
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patches by platform/OS release, and by bulletin topic.
The security patch matrix is also available via anonymous ftp:
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~ftp/export/patches/hp-ux_patch_matrix
D. To report new security vulnerabilities, send email to
security-alert@hp.com
Please encrypt any exploit information using the security-alert
PGP key, available from your local key server, or by sending a
message with a -subject- (not body) of 'get key' (no quotes) to
security-alert@hp.com.
Permission is granted for copying and circulating this Bulletin to
Hewlett-Packard (HP) customers (or the Internet community) for the
purpose of alerting them to problems, if and only if, the Bulletin
is not edited or changed in any way, is attributed to HP, and
provided such reproduction and/or distribution is performed for
non-commercial purposes.
Any other use of this information is prohibited. HP is not liable
for any misuse of this information by any third party.
________________________________________________________________________
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