SSRT4884 rev.1 - HP-UX TCP/IP Remote Denial of Service (DoS)
From: Security Alert (secure_at_hpchs.cup.hp.com)
Date: 06/03/05
- Previous message: Security Alert: "SSRT5954 rev.2 - HP-UX TCP/IP Remote Denial of Service (DoS)"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
Date: Fri, 03 Jun 2005 12:07:12 GMT
Keywords:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
HP SECURITY BULLETIN
HPSBUX01164 REVISION: 1
SSRT4884 rev.1 - HP-UX TCP/IP Remote Denial of Service (DoS)
NOTICE:
There are no restrictions for distribution of this Security
Bulletin provided that it remains complete and intact.
The information in this Security Bulletin should be acted upon
as soon as possible.
INITIAL RELEASE:
01 June 2005
POTENTIAL SECURITY IMPACT:
Remote Denial of Service (DoS)
SOURCE:
Hewlett-Packard Company
HP Software Security Response Team
VULNERABILITY SUMMARY:
A potential security vulnerability has been identified with HP-UX
running TCP/IP. This vulnerability could be remotely exploited by
an unauthorized user to cause a Denial of Service(DoS).
REFERENCES:
NISCC 532967, CAN-2004-0790, CAN-2004-0791, CAN-2004-1060
SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP-UX B.11.00, B.11.04, B.11.11, B.11.22, B.11.23
running TCP/IP.
BACKGROUND:
AFFECTED VERSIONS
HP-UX B.11.23
HP-UX B.11.22
HP-UX B.11.11
HP-UX B.11.00
=============
Networking.NET2-KRN
->action: set ip_pmtu_strategy= 0 and
either install binary files or filter ICMP
HP-UX B.11.04
=============
Networking.NET2-KRN
->action: set ip_pmtu_strategy= 0 and filter ICMP
END AFFECTED VERSIONS
RESOLUTION:
As reported in NISCC VU#532967 ICMP messages may be used to attack
TCP/IP connections.
<http://www.uniras.gov.uk/niscc/docs/
al-20050412-00308.html?lang=en>
There are three issues reported in NISCC VU#53296:
CVE number: CAN-2004-0790
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0790>
CVE number: CAN-2004-0791
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0791>
CVE number: CAN-2004-1060
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1060>
->Workarounds are available for all three of these issues.
->Binary files are available for CAN-2004-0790 and CAN-2004-0791
for HP-UX B.11.00, B.11.11, B.11.22, and B.11.23.
->Until binary files are available for B.11.04 the workarounds
should be used.
->Only a workaround is available for CAN-2004-1060.
->However, although changes in the binary files for CAN-2004-0790
and CAN-2004-0791 do not prevent the exploit of CAN-2004-1060,
they do make it less likely to succeed.
Please refer to the Manual Actions section below for a summary of
the required actions.
Workarounds:
->CAN-2004-0790 and CAN-2004-0791
Filter out the following ICMP messages:
Type 3, Code 2 (Destination Unreachable, Protocol Unreachable)
Type 3, Code 3 (Destination Unreachable, Port Unreachable)
Type 4, Code 0 (Source Quench)
->CAN-2004-1060
Set ip_pmtu_strategy=0.
Note: Filtering "Protocol Unreachable" and "Port Unreachable"
should not be done without careful testing. Filtering these
out may interfere with the correct functioning of network
components.
Filtering "Source Quench" should present little risk.
Note: HPSBUX01137 recommends setting ip_pmtu_strategy=0 or 3 as a
workaround for the problem of CAN-2005-1192. CAN-2004-1060
has a different root cause and cannot be worked around with
ip_pmtu_strategy=3. Only setting ip_pmtu_strategy=0 will
work around both CAN-2005-1192 and CAN-2004-1060.
Setting ip_pmtu_strategy=0
==================
Edit /etc/rc.config.d/nddconf to add the following:
TRANSPORT_NAME[n]=ip
NDD_NAME[n]=ip_pmtu_strategy
NDD_VALUE[n]=0
where 'n' is the next available index value as described in the
nddconf comments.
This value will take effect when the system is rebooted.
Until the system can be rebooted use the following command
to read the /etc/rc.config.d/nddconf file and set the tunable
parameters:
/usr/bin/ndd -c
The ip_pmtu_strategy parameter can be displayed by the following
command:
/usr/bin/ndd -get /dev/ip ip_pmtu_strategy
->Note: Since open connections will remain potentially vulnerable
until they are closed and certain internal data
structures are released it is recommended that the system
be rebooted.
Note: There is a defect that will cause "ndd -c" to fail if there
are more than 10 directives in /etc/rc.config.d/nddconf.
That defect is fixed in the following patches:
B.11.11 - PHNE_25644 or subsequent
B.11.04 - PHNE_26076 or subsequent
B.11.00 - PHNE_26125 or subsequent
Preliminary binary files
==============
- -> Preliminary binary files are available for B.11.00, B.11.11,
B.11.22, and B.11.23. These preliminary binary files address
CAN-2004-0790 and CAN-2004-0791 only. It will still be necessary
to work around CAN-2004-1060. However, although changes in the
binary files for CAN-2004-0790 and CAN-2004-0791 do not prevent
the exploit of CAN-2004-1060, they do make it less likely to
succeed.
Instructions for downloading and installing the binary files are
contained in readme files available here:
System: hprc.external.hp.com (192.170.19.51)
Login: icmp
Password: icmp
FTP Access: ftp://icmp:icmp@hprc.external.hp.com/
or: ftp://icmp:icmp@192.170.19.51/
Download the appropriate readme file containing further
instructions:
->readme.11.00.txt
readme.11.11.txt
->readme.11.22.txt
readme.11.23.txt
Verify the cksum or md5sum:
cksum readme*
->28442547442546 readme.11.00.txt
->21349385553525 readme.11.11.txt
-> 28363174662469 readme.11.22.txt
->4951652883646 readme.11.23.txt
md5sum readme*
->d28504f8532192de6a4f33bba4ea90ec readme.11.00.txt
->9f658170dc8fd10f42385d9a47793954 readme.11.11.txt
->cafbb24f3dc7131501142f75deaeccbd readme.11.22.txt
->001522b69a21197098416545749e8584 readme.11.23.txt
Download and install the binary files as discussed in the readme
files. The binary files are available in the same directory as
the readme files
MANUAL ACTIONS: Yes - NonUpdate
1. Set ip_pmtu_strategy=0
2. EITHER
a. Filter out the following ICMP messages:
Type 3, Code 2 (Destination Unreachable, Protocol Unreachable)
Type 3, Code 3 (Destination Unreachable, Port Unreachable)
Type 4, Code 0 (Source Quench)
OR
b. Install the appropriate binary file
(binary file not available for B.11.04).
BULLETIN REVISION HISTORY:
Revision 0: 25 May 2005
Initial release
Revision 1: 1 June 2005
Binary files for B.11.00 and B.11.22 are available.
Added information about CAN-2004-1060.
The "set ip_pmtu_strategy=0" workaround is required even if
binary files are installed.
Removed IPSec information.
HP-UX SPECIFIC SECURITY BULLETINS*: Security Patch Check revision
B.02.00 analyzes all HP-issued Security Bulletins to provide a
subset of recommended actions that potentially affect a specific
HP-UX system.
For more information:
http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
displayProductInfo.pl?productNumber=B6834AA
SUPPORT: For further information, contact normal HP Services
support channel.
REPORT: To report a potential security vulnerability with any HP
supported product, send Email to: security-alert@hp.com. It is
strongly recommended that security related information being
communicated to HP be encrypted using PGP, especially exploit
information. To obtain the security-alert PGP key please send an
e-mail message to security-alert@hp.com with the Subject of
'get key' (no quotes).
SUBSCRIBE: To initiate a subscription to receive future HP
Security Bulletins via Email:
http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=NA&
langcode=USENG&jumpid=in_SC-GEN__driverITRC&topiccode=ITRC
On the web page: ITRC security bulletins and patch sign-up
Under Step1: your IRTC security bulletins and patches
- check ALL categories for which alerts are required and
continue.
Under Step2: your IRTC operating systems
- verify your operating system selections are checked and
save.
To update an existing subscription:
http://h30046.www3.hp.com/subSignIn.php
Log in on the web page
Subscriber's choice for Business: sign-in.
On the Web page:
Subscriber's Choice: your profile summary
- use Edit Profile to update appropriate sections.
To review previously published Security Bulletins visit:
http://itrc.hp.com/service/cki/secBullArchive.do
* The Software Product Category that this Security Bulletin
relates to is represented by the 5th and 6th characters of the
Bulletin number:
GN = HP General SW,
MA = HP Management Agents,
MI = Misc. 3rd party SW,
MP = HP MPE/iX,
NS = HP NonStop Servers,
OV = HP OpenVMS,
PI = HP Printing & Imaging,
ST = HP Storage SW,
TL = HP Trusted Linux,
TU = HP Tru64 UNIX,
UX = HP-UX,
VV = HP Virtual Vault
System management and security procedures must be reviewed
frequently to maintain system integrity. HP is continually
reviewing and enhancing the security features of software products
to provide customers with current secure solutions.
"HP is broadly distributing this Security Bulletin in order to
bring to the attention of users of the affected HP products the
important security information contained in this Bulletin. HP
recommends that all users determine the applicability of this
information to their individual situations and take appropriate
action. HP does not warrant that this information is necessarily
accurate or complete for all user situations and, consequently, HP
will not be responsible for any damages resulting from user's use
or disregard of the information provided in this Bulletin. To the
extent permitted by law, HP disclaims all warranties, either
express or implied, including the warranties of merchantability
and fitness for a particular purpose, title and non-infringement."
(c)Copyright 2005 Hewlett-Packard Development Company, L.P.
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein. The information
provided is provided "as is" without warranty of any kind. To the
extent permitted by law, neither HP nor its affiliates,
subcontractors or suppliers will be liable for incidental, special
or consequential damages including downtime cost; lost profits;
damages relating to the procurement of substitute products or
services; or damages for loss of data, or software restoration.
The information in this document is subject to change without
notice. Hewlett-Packard Company and the names of Hewlett-Packard
products referenced herein are trademarks of Hewlett-Packard
Company in the United States and other countries. Other product
and company names mentioned herein may be trademarks of their
respective owners.
-----BEGIN PGP SIGNATURE-----
Version: PGP 8.1
iQA/AwUBQp75ROAfOvwtKn1ZEQJ3ZwCfcn7ZvzQ60pD1Sh4+bHxXBAugfDQAn0lA
y/vUj3cbDMVnuJNpimltcCuN
=bOf1
-----END PGP SIGNATURE-----
-- Yours truly, HP S/W Security Team WTEC Cupertino, California Return-Path: secure@cup.hp.com Reply-to: security-alert@hp.com
- Previous message: Security Alert: "SSRT5954 rev.2 - HP-UX TCP/IP Remote Denial of Service (DoS)"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] [ attachment ]
Relevant Pages
|
|
