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HP Tru64 UNIX Running the ps command, Local Disclosure of Sensitive Information



HPSBTU02179 SSRT061256 rev.1 - HP Tru64 UNIX Running the ps command, Local Disclosure of Sensitive Information
HPSBTU02179 SSRT061256 rev.1 - HP Tru64 UNIX Running the ps command, Local Disclosure of Sensitive Information



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SUPPORT COMMUNICATION - SECURITY BULLETIN

Document ID: c00817515
Version: 1

HPSBTU02179 SSRT061256 rev.1 - HP Tru64 UNIX Running the ps command, Local Disclosure of Sensitive Information

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

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

Potential Security Impact: Local disclosure of sensitive information

Source: Hewlett-Packard Company, HP Software Security Response Team

VULNERABILITY SUMMARY
A potential security vulnerability has been identified with the HP Tru64 UNIX Operating System running the ps command. The ps command could be used to disclose information about a process's arguments and environmental variables that might be exploited by a local, authorized user. 

References: None 

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
The following supported software versions are affected: 

HP Tru64 UNIX v5.1B-4 
HP Tru64 UNIX v5.1B-3 
HP Tru64 UNIX v5.1A PK6 
HP Tru64 UNIX v4.0G PK4 
HP Tru64 UNIX v4.0F PK8 

BACKGROUND


RESOLUTION
HP has released the following Early Release Patch kits (ERPs) publicly for use by any customer. 

The ERP kits use dupatch to install and will not install over any Customer Specific Patches (CSPs) that have file intersections with the ERP.

The resolutions contained in the ERP kits are targeted for availability in the following mainstream patch kit: 

HP Tru64 UNIX Version v5.1B-5

The ERP kits distribute the following files:

/usr/bin/ps 
/sbin/ps 

After installing the patch kit, by default, the HP Tru64 UNIX ps command behaves just the same: it can display a process's arguments, and the ps e command displays a process's environmental variables. 
To prevent users from seeing the arguments and environmental variables of other users, set new variables in the "/etc/rc.config.common" file (versions v5.1A PK6, v5.1B-3, v5.2B-4) or the "/etc/rc.config" file (versions v4.0G PK4 and v4.0F PK8) as follows: 

For HP Tru64 UNIX versions v5.1B-4, v5.1B-3 and v5.1A PK6, use:

# rcmgr -c set TBL_ARGUMENTS_DISABLE 1 
# rcmgr -c set TBL_ENVIRONMENT_DISABLE 1 

For HP Tru64 UNIX versions v4.0G PK4 and v4.0F PK8, use:

# rcmgr set TBL_ARGUMENTS_DISABLE 1 
# rcmgr set TBL_ENVIRONMENT_DISABLE 1 

Important notes about setting these new variables: 

Setting the new variables to prevent the ps command from allowing non-root users to display other users arguments and environment variables might cause some applications or program scripts to not function properly. 
The root user running the ps command will continue to be allowed to display other users arguments and environment variables. 

======================HP Tru64 UNIX Version v5.1B-4 ERP Kit 
======================
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?patchid=T64KIT1001143-V51BB27-ES-20070305 

Name: T64KIT1001143-V51BB27-ES-20070305

MD5 Checksum: 44b15d10895cf0606003a572b3310f9a

======================= 
HP Tru64 UNIX Version v5.1B-3 ERP Kit 
======================
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?patchid=T64KIT1001144-V51BB26-ES-20070305 

Name: T64KIT1001144-V51BB26-ES-20070305

MD5 Checksum: 67cfabb7cd3c422e2dc6bb6ed3d7d290
 
======================HP Tru64 UNIX Version v5.1A PK6 ERP Kit 
======================
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?patchid=T64KIT1001145-V51AB24-ES-20070305 

Name: T64KIT1001145-V51AB24-ES-20070305

MD5 Checksum: de6885b166dba703af862ce05431e5cc

======================= 
HP Tru64 UNIX Version v4.0G PK4 ERP Kit 
======================
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?patchid=T64KIT1001179-V40GB22-ES-20070330 

Name: T64KIT1001179-V40GB22-ES-20070330

MD5 Checksum: 31129e60bb01ffdea015312c0e019fae

======================= 
HP Tru64 UNIX Version v4.0F PK8 ERP Kit 
======================
Location: http://www.itrc.hp.com/service/patch/patchDetail.do?patchid=DUXKIT1001180-V40FB22-ES-20070330 

Name: DUXKIT1001180-V40FB22-ES-20070330

MD5 Checksum: db9d634bb27f02642e00f149d6ebb8ee
 


PRODUCT SPECIFIC INFORMATION 

HISTORY 

Version:1 (rev.1) - 25 April 2007 Initial release 

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@hp.com 
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@hp.com 
  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 VirtualVaultt
 


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."

ęCopyright 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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