Security Bulletin: Potential XML External Entity (XXE) Injection Vulnerability in WebSphere Application Server (CVE-2018-1905)

Security Bulletin

Summary

There is a potential XXE injection vulnerability in the Knowledge Center used by WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2018-1905
DESCRIPTION: IBM WebSphere Application Server is vulnerable to a XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources.
CVSS Base Score: 7.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/152534 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L)

Affected Products and Versions

This vulnerability affects the following versions and releases of IBM WebSphere Application Server:

Version 9.0

Remediation/Fixes

The recommended solution is to apply the interim fix, Fix Pack or PTF containing the APAR for each named product as soon as practical.

For WebSphere Application Server traditional:

For V9.0.0.0 through 9.0.0.9:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH04192
--OR--
· Apply Fix Pack 9.0.0.10 or later.

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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

Complete CVSS v3 Guide
On-line Calculator v3

Off

Acknowledgement

The vulnerability was reported to IBM by Benoit Côté-Jodoin from GoSecure

Change History

20 November 2018: 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.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Tips

Security Bulletin: Potential XML External Entity (XXE) Injection Vulnerability in WebSphere Application Server (CVE-2018-1905)