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__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
HP-UX vuefile, vuepad, dtfile, & dtpad Vulnerabilities
September 9, 1997 22:00 GMT Number H-105
______________________________________________________________________________
PROBLEM: Users can inadvertently allow access to their accounts by
running vuefile, vuepad, dtfile, or dtpad to displays they do
not control.
PLATFORM: HP9000 Series 700/800s running HP-UX releases 9.X and 10.X.
DAMAGE: May allow unauthorized users to gain root privileges.
SOLUTION: Inform users they should never run vuefile, vuepad, dtfile, or
dtpad while su'd to another account. They also should never run
these programs with the display directed to another Xserver
unless they are logged into that Xserver in the same account.
______________________________________________________________________________
VULNERABILITY The information in the following Security Advisory should be
ASSESSMENT: 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 Advisory as soon as possible.
______________________________________________________________________________
[ Start Hewlett-Packard Advisory ]
Document ID: HPSBUX9709-069
Date Loaded: 970909
Title: Security Advisory in vuefile, vuepad, et. al. in HP-UX
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HEWLETT-PACKARD SECURITY ADVISORY: #00069, 08 September 1997
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The information in the following Security Advisory 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 Advisory as soon as possible.
- -------------------------------------------------------------------------
PROBLEM: Users can inadvertently allow access to their accounts
by running vuefile, vuepad, dtfile, or dtpad to displays
they do not control.
PLATFORM: HP9000 Series 700/800s running HP-UX releases 9.X and 10.X
DAMAGE: Users can gain privileges.
SOLUTION: Do not run vuefile, vuepad, dtfile, or dtpad while su'd to
another account. Also do not run them with the display set
to another Xserver, unless the same account is logged in at
each Xserver.
AVAILABILITY: Not applicable
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I.
A. Background
Vuefile, vuepad, dtfile, and dtpad do not authenticate users.
Care must be taken to insure that only one user per Xserver runs
these programs.
B. Fixing the problem
The current and perhaps only solution is to avoid the situation.
This advisory will be updated if patches become available.
C. Recommended solution
Inform users so that they can avoid the situation. They should
never run vuefile, vuepad, dtfile, or dtpad while su'd to another
account.
They also should never run these programs with the display directed
to another Xserver unless they are logged into that Xserver in the
same account.
One way to make it more difficult for a user to su and run these
programs is to enable per user authorization. This eliminates
the potential for a user to run the programs on the wrong display
by accidentally mistyping the display name.
Per-user authorization is the default in CDE. In Vue, it can be
enabled in /usr/vue/config/Xconfig:
# To enable R4 MIT-MAGIC-COOKIE-1 per-user authorization.
#
Vuelogin*authorize: True
Note that if per-user authorization is not enabled many
security breaches are possible. For example, it is possible
for a program to capture keystrokes typed on the Xserver.
The root user can circumvent the per-user authorization and
non-root users can give the Xauthority away. So all users
still must be aware not to run vuefile, vuepad, dtfile, or
dtpad as described above.
D. 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.
E. 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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[ End Hewlett-Packard Advisory ]
______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Hewlett-Packard for the
information contained in this bulletin.
______________________________________________________________________________
CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
National Laboratory in Livermore, California. CIAC is also a founding
member of FIRST, the Forum of Incident Response and Security Teams, a
global organization established to foster cooperation and coordination
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CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
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E-mail: ciac@llnl.gov
For emergencies and off-hour assistance, DOE, DOE contractor sites,
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Previous CIAC notices, anti-virus software, and other information are
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World Wide Web: http://ciac.llnl.gov/
Anonymous FTP: ciac.llnl.gov (198.128.39.53)
Modem access: +1 (510) 423-4753 (28.8K baud)
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CIAC has several self-subscribing mailing lists for electronic
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You will receive an acknowledgment email immediately with a confirmation
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PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
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LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC)
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H-97: SGI IRIX ftpd Signal Handling Vulnerability
H-98: SunOS automounter Vulnerability
H-99: SunOS, Solaris ifconfig ioctls Vulnerability
H-100: SunOS, Solaris libXt Vulnerability
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