Security Bulletin
Summary
WebSphere Message Broker and IBM Integration Bus are affected by denial of service vulnerability. Pattern matching while validating a specially crafted XML document causes XML4C to consume 100% CPU
Vulnerability Details
CVEID: CVE-2014-8901
DESCRIPTION: IBM XML4J and XML4C libraries contain a denial of service vulnerability when loading specially crafted content. This causes the CPU to consume 100% of available resources and creates serious performance degradation to the system.
CVSS Base Score: 4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/99110 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:S/C:N/I:N/A:P)
Affected Products and Versions
WebSphere Message Broker V8
IBM Integration Bus V9 and V10
Remediation/Fixes
To mitigate the vulnerability, after an interim fix or fixpack containing IT07064 is applied you must set the following environment variable to disable the use of regular expressions by the MRM parser before starting the broker or integration node:
- MQSI_DISABLE_REGEX_IN_XML4C=yes
For unsupported versions of the product IBM recommends upgrading to a fixed, supported version/release/platform of the product.
The planned maintenance release dates for WebSphere Message Broker and IBM Integration Bus are available at :
http://www.ibm.com/support/docview.wss?uid=swg27006308
Workarounds and Mitigations
None known
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Important Note
IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.
References
Acknowledgement
None
Change History
29-February-2016 - Original version Published
*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 Security Bulletin.
Disclaimer
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Internal Use Only
Product Synonym
WMB IIB
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Document Information
Modified date:
23 March 2020
UID
swg21697458