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Digest Name: Daily Security Bulletins Digest
Created: Sat Jan 1 3:00:03 PST 2000
Table of Contents:
Document ID Title
--------------- -----------
HPSBUX0001-108 Security Vulnerability in Aserver
The documents are listed below.
-------------------------------------------------------------------------------
Document ID: HPSBUX0001-108
Date Loaded: 19991231
Title: Security Vulnerability in Aserver
-------------------------------------------------------------------------
HEWLETT-PACKARD COMPANY SECURITY ADVISORY: #00108, 01 Jan 2000
-------------------------------------------------------------------------
The information in the following Security Advisory 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 Advisory as soon as possible.
-------------------------------------------------------------------------
PROBLEM: /opt/audio/bin/Aserver can be used to gain root access.
PLATFORM: HP9000 Series 7/800 running HP-UX releases 10.X and 11.X
DAMAGE: Root access is possible.
SOLUTION: Until patches are available disable the Aserver (see below).
AVAILABILITY: This advisory will be updated when patches are available.
-------------------------------------------------------------------------
I.
A. Background
A procedure to use /opt/audio/bin/Aserver to gain root access
has been made public.
B. Recommended solution
Until a patch is available, the only two temporary fixes currently
available are to disable /opt/audio/bin/Aserver by removing the
file, or to remove execute permissions as follows.
As root remove functionality with:
chmod 400 /opt/audio/bin/Aserver
As an alternative, if it is absolutely necessary to run the Aserver,
it can be run - yet the system will be vulnerable while the Aserver
is starting.
Again as root:
chmod 6555 /opt/audio/bin/Aserver
[***Warning - /opt/audio/bin/Aserver is now vulnerable.***]
/opt/audio/bin/Aserver -f
[Wait for the parent and child processes to start.]
chmod 400 /opt/audio/bin/Aserver
[/opt/audio/bin/Aserver is now safe.]
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________________________________________________________________________
-----End of Document ID: HPSBUX0001-108--------------------------------------
