IBM WebSphere Message Broker Security Vulnerability: potential for product files to be owned by a non-trusted user (CVE-2012-3317)

VULNERABILITY DETAILS

CVE ID: CVE-2012-3317

DESCRIPTION:
When the WebSphere Message Broker, MBX, IE02 and IS02 uninstaller IBM Java Runtime Environment (JRE) files are created, they are not owned by the same user and group as the other product files. This ownership may not resolve to a trusted user on every system, and gives that user the ability to change program files which will later be run by the root user. The JRE files should be owned by the same user as other installed WebSphere Message Broker, MBX, IE02 and IS02 files.

CVSS:
CVSS base score: 6.9
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/77818 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:L/AC:M/Au:N/C:C/I:C/A:C)

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Flash.

AFFECTED PLATFORMS:
IBM WebSphere Message Broker runtime V8.0 who run on UNIX or Linux.
IBM WebSphere Message Broker Explorer V7.0 and V8.0 who run on UNIX or Linux.
IBM WebSphere Message Broker - ODBC Database Extender (IE02) V1 and V2 who run on UNIX or Linux.

REMEDIATION:
The recommended solution is to apply the Fix Pack mentioned below as soon as it is available. Prior to availability it is recommended that you follow the workaround instructions below.

FIX
IBM WebSphere Message Broker APAR IC88472 which is targeted for 8.0.0.2 and 7.0.0.6 - see IBM WebSphere Message Broker planned maintenance release dates for target availability: http://www-01.ibm.com/support/docview.wss?uid=swg27006308

WORKAROUND:

Log on to the system and make sure that all files in the WebSphere Message Broker installation locations are owned by the expected user. For example on a Linux system that was installed by the root user, issue the following commands as root: chown –R root:root /opt/ibm/mqsi/8.0.0.0 chown –R root:root /opt/ibm/IE02/2.0.0 chown –R root:root /opt/IBM/MBExplorer The installation paths should be modified as appropriate for the version of WebSphere Message Broker and chosen installation directories.

MITIGATION
None known

REFERENCES:
Complete CVSS Guide ( http://www.first.org/cvss/cvss-guide.html)
On-line Calculator V2 ( http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2)

X-Force Vulnerability Database ( http://xforce.iss.net/xforce/xfdb/77818)
CVE-2012-3317 ( http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3317)

CHANGE HISTORY:
2012/11/29: Original Copy Published
2012/12/12: Clarified workaround information
2013/01/10: Clarification of platforms affected and APAR number
2013/01/16: Updated to correct the target level for version 7

Note: According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.