Security Bulletin: IBM WebSphere Application Server Liberty is vulnerable to a Denial of Service due to Neko HTML (CVE-2022-24839)

Summary

There is a vulnerability in the Neko HTML library used by IBM WebSphere Application Server Liberty with the openid-2.0 feature enabled. This has been addressed.

Vulnerability Details

CVEID:CVE-2022-24839
**DESCRIPTION:**Sparkle Motion Nokogiri is vulnerable to a denial of service, caused by a java.lang.OutOfMemoryError exception when parsing ill-formed HTML markup in the fork of org.cyberneko.html. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service condition.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/224089 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the APAR PH48810. To determine if a feature is enabled for IBM WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature.

For IBM WebSphere Application Server Liberty 17.0.0.3 - 22.0.0.10 using the openid-2.0 feature(s):
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH48810
--OR–
· Apply Liberty Fix Pack 22.0.0.11 or later (targeted availability 4Q2022).

Additional interim fixes may be available and linked off the interim fix download page.

Workarounds and Mitigations

None