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The U.S. Department of Energy
Computer Incident Advisory Capability
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INFORMATION BULLETIN
HP-UX Vulnerabilities in elm and rdist Programs
August 14, 1996 18:00 GMT Number G-36
______________________________________________________________________________
PROBLEM: Vulnerabilities have been discovered in the elm and rdist
programs running under HP-UX.
PLATFORM: The elm vulnerability is found on HP 9000 series
300/400/700/800 systems running any version HP-UX 9.x or 10.x.
The vulnerability in rdist is only in releases 10.0x, 10.10 and
10.20 of HP-UX running on HP 9000 series 700 and 800 systems.
DAMAGE: The elm vulnerability allows user files to be modified by
non-owners. The rdist vulnerability can allow an unauthorized
user root access.
SOLUTION: Apply the patches listed in the vendor section of the bulletin
below.
______________________________________________________________________________
VULNERABILITY These vulnerabilities are widely known. It is highly
ASSESSMENT: recommended that you apply these patches as soon as possible.
______________________________________________________________________________
[Begin HP Bulletin]
===============================================================================
Document Id: [HPSBUX9608-037]
Date Loaded: [08-08-96]
Description: Security Vulnerability in elm
===============================================================================
-------------------------------------------------------------------------
HEWLETT-PACKARD SECURITY ADVISORY: HPSBUX08-037, 08 August 1996
-------------------------------------------------------------------------
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: Vulnerabilities in elm executable.
PLATFORM: HP 9000 series 300/400/700/800 systems running any version HP-UX
9.X or 10.X.
DAMAGE: User files can be modified by non-owners. When running a
restricted shell escapes may be possible.
SOLUTION: Apply patch PHCO_7204 (series 300/400,HP-UX 9.X), or
PHNE_7342 (series 700/800, HP-UX 9.X), or
PHNE_7343 (series 700/800, HP-UX 10.X).
AVAILABILITY:
All of the patches are available now.
For BLS system patch availability please contact your support
representative.
_________________________________________________________________________
I. elm
A. Background
Based on information detailed in CERT(sm) Vendor-Initiated Bulletin
VB-95:10 Hewlett-Packard has found problems in the version of elm
shipped with currently supported HP-UX releases.
B. Fixing the problem
Hewlett-Packard has created the above patches using the information
from the vendor. These vulnerabilities can be eliminated by
installing the patches referenced herein.
C. Impact of the patch
The patches provide a new version of the necessary executables
to fix the vulnerability. Installation instructions are contained
within the patches.
D. To subscribe to automatically receive future NEW HP Security
Bulletins from the HP SupportLine mail service via electronic
mail, send an email message to:
support@us.external.hp.com (no Subject is required)
Multiple instructions are allowed in the TEXT PORTION OF THE
MESSAGE, here are some basic instructions you may want to use:
To add your name to the subscription list for new security
bulletins, send the following in the TEXT PORTION OF THE MESSAGE:
subscribe security_info
To retrieve the index of all HP Security Bulletins issued to
date, send the following in the TEXT PORTION OF THE MESSAGE:
send security_info_list
To get a patch matrix of current HP-UX and BLS security
patches referenced by either Security Bulletin or Platform/OS,
put the following in the text portion of your message:
send hp-ux_patch_matrix
World Wide Web service for browsing of bulletins is available
via our URL: http://us.external.hp.com
Choose "Support news", then under Support news,
choose "Security Bulletins"
E. To report new security vulnerabilities, send email to
security-alert@hp.com
Please encrypt 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.
________________________________________________________________________
===============================================================================
Document Id: [HPSBUX9608-036]
Date Loaded: [08-08-96]
Description: Security Vulnerability in rdist
===============================================================================
-------------------------------------------------------------------------
HEWLETT-PACKARD SECURITY BULLETIN: HPSBUX9608-036, 08 Aug 96
-------------------------------------------------------------------------
Hewlett-Packard recommends that 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.
_______________________________________________________________________
PROBLEM: Security vulnerability in rdist only in releases 10.0X, 10.10,
& 10.20 of HP-UX.
PLATFORM: HP 9000 Series 700 and 800s
DAMAGE: A vulnerability in rdist exists allowing local users to gain
root privileges.
SOLUTION: Apply patches PHNE_8107 (series 700/800, HP-UX 10.00 & 10.01)
and PHCO_7798 (series 700/800, HP_UX 10.00 & 10.01)
or patch PHNE_7919 (series 700/800, HP-UX 10.10)
PHNE_7920 (series 700/800, HP-UX 10.20)
AVAILABILITY: All patches are available now, except PHNE_7920 which
will be available after 8 August.
_______________________________________________________________________
I. rdist Update
A. Background
A recent CERT advisory (CERT CA-96.14) more fully describes a
vulnerability in the rdist utility. It has been found that specific
HP-UX 10.XX releases have this vulnerability.
B. Fixing the problem
The vulnerability can be eliminated from releases 10.0, 10.01, 10.10,
and 10.20 of HP-UX by applying the patches mentioned above. HP-UX
releases prior to 10.X and after 10.20 (i.e., 10.30) are not
vulnerable.
Hewlett-Packard recommends that all customers concerned with the
security of their HP-UX systems either apply the appropriate patch
or change perform the actions described above as soon as possible.
C. How to Install the Patch (for HP-UX 10.X)
1. Determine which patch is appropriate for your hardware platform
and operating system:
Both:
PHNE_8107 for series 700/800, HP-UX 10.00 10.01
PHCO_7798 for series 700/800, HP_UX 10.00 10.01
or:
PHNE_7919 for series 700/800, HP-UX 10.10
PHNE_7920 for series 700/800, HP-UX 10.20
2. Hewlett Packard's HP-UX patches are available via email and World
Wide Web.
To obtain a copy of the HP SupportLine email service user's guide,
send the following in the TEXT PORTION OF THE MESSAGE to
support@us.external.hp.com (no Subject is required):
send guide
The users guide explains the process for downloading HP-UX patches
via email and other services available.
World Wide Web service for downloading of patches is available
via our URL:
http://us.external.hp.com
3. Apply the necessary patch(es) to your HP-UX system.
4. Examine /tmp/update.log for any relevant WARNINGs or ERRORs.
[End HP Bulletin]
_______________________________________________________________________________
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
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LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC)
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G-28A: suidperl Vulnerability
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G-30: DEC Software Security Kits
G-31: FreeBSD Security Vulnerabilities (ppp, rdist, and rz)
G-32: HP-UX Vulnerabilities in expreserve, rpc.pcnfsd, rpc.statd
G-33: rdist vulnerability
G-34: HP-UX Vulnerabilities (netttune, SAM remote admin)
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Notes 11 - 7/31/95 Virus Update, Hats Off to Administrators,
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