Published:
05 November 1997
Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-97.145 -- Hewlett-Packard Security Advisory: #00073
Security Vulnerability in xlock on VVOS, HP-UX 10.24
6 November 1997
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Hewlett-Packard has released the following security bulletin regarding a
vulnerability in the xlock program on VirtualVault 2.0/3.0 under HP-UX
10.24 if patch PHSS_9905 has been installed. This vulnerability may allow
local users to gain unauthorized access to the system.
The following security bulletin is provided as a service to AUSCERT's
members. As AUSCERT did not write this document, AUSCERT has had no
control over its content. As such, the decision to use any or all of this
information is the responsibility of each user or organisation, and should
be done so in accordance with site policies and procedures.
Contact information for HP is included in the Security Bulletin below.
If you have any questions or need further information, please contact them
directly.
Previous advisories and external security bulletins can be retrieved
from:
http://www.auscert.org.au/information/advisories.html
If you believe that your system has been compromised, contact AUSCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 4477
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AUSCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
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HEWLETT-PACKARD SECURITY BULLETIN: #00073, 4 November 1997
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The information in the following Security Bulletin should be acted upon
as soon as possible. Hewlett-Packard 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: Vulnerabilities exist in xlock on VirtualVault 2.0/3.0 if patch
PHSS_9905 is installed.
PLATFORM: HP9000 Series 700/800s running:
HP-UX 10.24 (VVOS) with VirtualVault A.02.00 with patch PHSS_9905.
HP-UX 10.24 (VVOS) with VirtualVault A.03.00 with Extensions
Software (this includes PHSS_9905)
DAMAGE: The xlock vulnerability could result in allowing a local user
to gain unauthorized access to the system.
SOLUTION: Apply PHSS_12961 to correct the vulnerability.
AVAILABILITY: The patch is available now.
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I.
A. Background
The xlock program allows a user to "lock" an X terminal while
maintaining their login session. A vulnerability exists in xlock
that could allow a local user to attain unauthorized access to the
system.
B. Fixing the problem
This problem can be eliminated by applying the recommended patch.
C. Recommended solution
Hewlett-Packard recommends that the PHSS_12961 patch be applied if
PHSS_9905 has already been installed. The PHSS_9905 patch is
included in the Software Extension Media provided with VirtualVault
A.03.00.
NOTE:
These problems only apply to systems running the VirtualVault
Operating System 10.24 that is part of the VirtualVault product
A.02.00 and A.03.00.
D. Impact of the patch
Applying PHSS_12961 eliminates the vulnerability in the xlock
program but does not otherwise impact the system.
E. To subscribe to automatically receive future NEW HP Security
Bulletins from the HP Electronic Support Center via electronic mail,
do the following:
Use your browser to get to the HP Electronic Support Center page at:
http://us-support.external.hp.com
(for US, Canada, Asia-Pacific, & Latin-America)
http://europe-support.external.hp.com
(for Europe)
Click on the Technical Knowledge Database, register as a user
(remember to save the User ID assigned to you, and your password),
and it will connect to a HP Search Technical Knowledge DB page.
Near the bottom is a hyperlink to our Security Bulletin archive.
Once in the archive there is another link to our current
security patch matrix. Updated daily, this matrix is categorized
by platform/OS release, and by bulletin topic.
F. 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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