There is an information disclosure due to an XML external entity (XXE) vulnerability when using the OpenSAML features in WebSphere Application Server Liberty.
DESCRIPTION: OpenSAML could allow a remote authenticated attacker to obtain sensitive information, caused by an error when parsing XML entities. By persuading a victim to open a specially-crafted XML document containing external entity references, an attacker could exploit this vulnerability to obtain sensitive information.
CVSS Base Score: 4.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/89714 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N)
Affected Products and Versions
This vulnerability affects the following versions and releases of IBM WebSphere Application Server:
- Liberty using samlWeb-2.0 feature
- Liberty using wsSecuritySaml-1.1 feature
The recommended solution is to apply the interim fix or Fix Pack contain APAR PI89102 for each named product as soon as practical.
For WebSphere Application Server Liberty using the OpenSAML features:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI89103
· Apply Liberty Fix Pack 18.104.22.168 or later.
Get Notified about Future Security Bulletins
14 November 2017: original document 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.
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.
15 June 2018