__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Center
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INFORMATION BULLETIN
HP-UX telnetd Security Vulnerability
[Hewlett-Packard Company Security Bulletin #0172]
October 18, 2001 21:00 GMT Number M-006
______________________________________________________________________________
PROBLEM: A potential remotely exploitable buffer overflow exists in
telnetd.
PLATFORM: HP9000 Servers running HP-UX releases 10.X only.
DAMAGE: An intruder can potentially execute arbitrary code with the
privileges of the telnetd process.
SOLUTION: Apply patches, or fixes, as outlined below.
______________________________________________________________________________
VULNERABILITY The risk is HIGH. Attacker can potentially get remote root
ASSESSMENT: access.
______________________________________________________________________________
LINKS:
CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/m-006.shtml
______________________________________________________________________________
[***** Start Hewlett-Packard Company Security Bulletin #0172 *****]
-----------------------------------------------------------------
HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #0172
Originally issued: 16 October 2001
-----------------------------------------------------------------
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.
------------------------------------------------------------------
PROBLEM: Systems running telnetd may permit unauthorized remote
access.
See: http://www.cert.org/advisories/CA-2001-21.html
This vulnerability has been assigned the identifier
CAN-2001-0554 by the Common Vulnerabilities and Exposures
(CVE) group:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0554
PLATFORM: HP9000 Servers running HP-UX releases 10.X only.
DAMAGE: An intruder can potentially execute arbitrary code
with the privileges of the telnetd process.
SOLUTION: Apply the following patches to the release specified.
10.01 PHNE_24820,
10.10 PHNE_24820,
10.20 PHNE_24821,
SIS 10.20 PHNE_24822 (Telnet kerberos Patch),
10.24 PHNE_25217.
MANUAL ACTIONS: The Secure Internet Services (SIS) product, if
enabled, has to be disabled before the installation
or removal of PHNE_24822 (Telnet kerberos Patch).
AVAILABILITY: The patches are available now from http://itrc.hp.com.
------------------------------------------------------------------
A. Background
A potential remotely exploitable buffer overflow in telnetd has
been reported to Hewlett-Packard Company. It is unique to HP-UX
releases 10.X only.
B. Fixing the problem
Disable telnetd (by commenting out the /etc/inetd.conf entry for
telnetd and running '/usr/sbin/inetd -c') if telentd is not needed
on your system.
Install the appropriate patch from the list below.
C. Recommended solution
Apply the following patches to the release specified.
10.01 PHNE_24820,
10.10 PHNE_24820,
10.20 PHNE_24821,
SIS 10.20 PHNE_24822,
10.24 PHNE_25217.
All patches are available now from http://itrc.hp.com.
D. To subscribe to automatically receive future NEW HP Security
Bulletins from the HP IT Resource Center via electronic
mail, do the following:
Use your browser to get to the HP IT Resource Center page
at:
http://itrc.hp.com
Use the 'Login' tab at the left side of the screen to login
using your ID and password. Use your existing login or the
"Register" button at the left to create a login, in order to
gain access to many areas of the ITRC. Remember to save the
User ID assigned to you, and your password.
In the left most frame select "Maintenance and Support".
Under the "Notifications" section (near the bottom of
the page), select "Support Information Digests".
To -subscribe- to future HP Security Bulletins or other
Technical Digests, click the check box (in the left column)
for the appropriate digest and then click the "Update
Subscriptions" button at the bottom of the page.
or
To -review- bulletins already released, select the link
(in the middle column) for the appropriate digest.
To -gain access- to the Security Patch Matrix, select
the link for "The Security Bulletins Archive". (near the
bottom of the page) Once in the archive the third link is
to the current Security Patch Matrix. Updated daily, this
matrix categorizes security patches by platform/OS release,
and by bulletin topic. Security Patch Check completely
automates the process of reviewing the patch matrix for
11.XX systems.
For information on the Security Patch Check tool, see:
http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
displayProductInfo.pl?productNumber=B6834AA"
The security patch matrix is also available via anonymous
ftp:
ftp.itrc.hp.com:~ftp/export/patches/hp-ux_patch_matrix
On the "Support Information Digest Main" page:
click on the "HP Security Bulletin Archive".
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.
________________________________________________________________
-----End of Document ID: HPSBUX0110-172--------------------------------------
[***** End Hewlett-Packard Company Security Bulletin #0172 *****]
_______________________________________________________________________________
CIAC wishes to acknowledge the contributions of Hewlett-Packard Company for the
information contained in this bulletin.
_______________________________________________________________________________
CIAC, the Computer Incident Advisory Center, 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
among computer security teams worldwide.
CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
can be contacted at:
Voice: +1 925-422-8193 (7x24)
FAX: +1 925-423-8002
STU-III: +1 925-423-2604
E-mail: ciac@ciac.org
Previous CIAC notices, anti-virus software, and other information are
available from the CIAC Computer Security Archive.
World Wide Web: http://www.ciac.org/
Anonymous FTP: ftp.ciac.org
PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
communities receive CIAC bulletins. If you are not part of these
communities, please contact your agency's response team to report
incidents. Your agency's team will coordinate with CIAC. The Forum of
Incident Response and Security Teams (FIRST) is a world-wide
organization. A list of FIRST member organizations and their
constituencies can be obtained via WWW at http://www.first.org/.
This document was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States
Government nor the University of California nor any of their
employees, makes any warranty, express or implied, or assumes any
legal liability or responsibility for the accuracy, completeness, or
usefulness of any information, apparatus, product, or process
disclosed, or represents that its use would not infringe privately
owned rights. Reference herein to any specific commercial products,
process, or service by trade name, trademark, manufacturer, or
otherwise, does not necessarily constitute or imply its endorsement,
recommendation or favoring by the United States Government or the
University of California. The views and opinions of authors expressed
herein do not necessarily state or reflect those of the United States
Government or the University of California, and shall not be used for
advertising or product endorsement purposes.
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