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[security bulletin] HPSBUX01137 SSRT5954 rev.10 - HP-UX Running TCP/IP (IPv4), Remote Unauthorized Denial of Service (DoS)



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SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c00571568
Version: 10

HPSBUX01137 SSRT5954 rev.10 - HP-UX Running TCP/IP (IPv4), Remote Unauthorized 
Denial of Service (DoS)

NOTICE: The information in this Security Bulletin should be acted upon as soon 
as possible.

Release Date: 2005-04-24
Last Updated: 2007-04-25

Potential Security Impact: Remote unauthorized 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 (IPv4). This vulnerability could be remotely exploited by an 
unauthorized user to cause a Denial of Service (DoS). 

References: CAN-2005-1192 

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP-UX B.11.11, B.11.22, B.11.23. 

BACKGROUND

To determine if an HP-UX system has an affected version, 
search the output of "swlist -a revision -l fileset" 
for one of the filesets listed below. For affected systems 
verify that the recommended action has been taken. 

AFFECTED VERSIONS 

HP-UX B.11.11 
============= 
Networking.NET2-KRN 
action: install PHNE_33159 

HP-UX B.11.22 
============= 
Networking.NET2-KRN 
action: install preliminary binary files per Security Bulletin HPSBUX01164 

HP-UX B.11.23 
============= 
Networking.NET2-KRN 
action: install PHNE_32606 

HP-UX B.11.11 
============= 
IPSec.IPSEC2-KRN 
action: install revision A.01.07.02 and PHNE_33159 or subsequent 

HP-UX B.11.11 
============= 
IPSec.IPSEC2-KRN 
action: install revision A.02.00.01 and TOUR 3.0 

HP-UX B.11.23 
============= 
IPSec.IPSEC2-KRN 
action: install revision A.02.00.01 and PHNE_32606 or subsequent 

HP-UX B.11.23 
============= 
IPSec.IPSEC2-KRN 
action: install revision A.02.00.01 and TOUR 3.0 

END AFFECTED VERSIONS 

Certain network traffic can result in a Denial of Service (DoS) for HP-UX 
systems running TCP/IP (IPv4). Receiving a certain packet on any open TCP/IP 
connection can result in a Denial of Service (DoS) condition which can only be 
corrected by a reboot of the affected system. The Denial of Service (DoS) is 
characterized by high cpu utilization and a lack of response on any I/O port 
including the system console. 

Previous revisions of this Security Bulletin recommended setting 
ip_pmtu_strategy to 0 or 3 as a workaround. Patches or updates to resolve the 
issue are now available. After these patches or updates are installed the 
workaround will no longer be necessary or recommended. 
- ->The ip_pmtu_strategy parameter should be restored to the default value of 
1. 
- ->Note: Previous versions of this Security Bulletin incorrectly stated that 
the default value of ip_pmtu_strategy is 2. 

RESOLUTION
Patches are available for the core TCP/IP product for 
B.11.11 and B.11.23 from http://itrc.hp.com 

For B.11.11 - PHNE_33159 or subsequent 
For B.11.23 - PHNE_32606 or subsequent 

Binary files are available for B.11.22 as discussed in Security Bulletin 
HPSBUX01164. 

Patches and updates are available for IPSec. 
The patches are available from http://itrc.hp.com 
IPSec and TOUR (Transport Optional Upgrade Release) are available from 
http://www.hp.com/go/softwaredepot 

For B.11.11 IPSec: 
IPSec revision A.01.07.02 and PHNE_33159 or subsequent 
or 
IPSec revision A.01.07.02 and TOUR 3.0 

For B.11.23 IPSec: 
IPSec revision A.02.00.01 and PHNE_32606 or subsequent 
or 
IPSec revision A.02.00.01 and TOUR 3.0 

MANUAL ACTIONS: Yes - NonUpdate 
B.11.22 Install preliminary binary files per Security Bulletin HPSBUX01164. 

B11.11 running IPSec 
Install IPSec revision A.01.07.02 and PHNE_33159 or subsequent 
or 
Install IPSec revision A.01.07.02 and TOUR 3.0 

B11.23 running IPSec 
Install IPSec revision A.02.00.01 and PHNE_32606 or subsequent 
or 
Install IPSec revision A.02.00.01 and TOUR 3.0 

PRODUCT SPECIFIC INFORMATION 

HP-UX Software Assistant: HP-UX Software Assistant is an enhanced application 
that replaces HP-UX Security Patch Check. It analyzes all HP-issued Security 
Bulletins and lists recommended actions that may apply to a specific HP-UX 
system. It can also download patches and create a depot automatically. For more 
information see: 
https://www.hp.com/go/swa 

HISTORY 
Revision:0 (rev.0) - 24 April 2005 Initial release 
Revision:1 (rev.1) - 25 May 2005 Binary files available per Security Bulletin 
HPSBUX01164 
Revision:2 (rev.2) - 1 June 2005 IPSec not included in binary files 
Revision:3 (rev.3) - 27 June 2005 PHNE_33159 is available for B.11.11 
Revision: 4 (rev.4) - 10 July 2005 PHNE_32606 is available for B.11.23 
Revision:5 (rev.5) - 24 July 2005 Clarified the Resolution and Manual Actions 
sections 
Revision:6 (rev.6) - 5 December 2005 IPSec revisions available 
Version:7 (rev.7) - Skipped for formatting reasons 
Version:8 (rev.8) - 23 January 2006 Add rev. to title 
Version:9 (rev.9) - 2 April 2007 Change A.2.00.01 to A.02.00.01 
Version:10 (rev.10) - 30 April 2007 Default value for ip_pmtu_strategy is 1, 
not 2 

Third Party Security Patches: Third party security patches which are to be 
installed on systems running HP software products should be applied in 
accordance with the customer's patch management policy. 

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@xxxxxx 
It is strongly recommended that security related information being communicated 
to HP be encrypted using PGP, especially exploit information. 
To get the security-alert PGP key, please send an e-mail message as follows:
  To: security-alert@xxxxxx 
  Subject: get key

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 ITRC security bulletins and patches 
  - check ALL categories for which alerts are required and continue.
Under Step2: your ITRC 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://www.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 in the title:

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 VirtualVault


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."

©Copyright 2007 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 or 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.
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