Security Bulletin: Liberty for Java for IBM Cloud 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 Liberty for Java for IBM Cloud 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

These vulnerabilities affect all versions of Liberty for Java for IBM Cloud up to and including v3.74.

Remediation/Fixes

To upgrade to Liberty for Java for IBM Cloud v3.75-20221012-1015 or higher, you must re-stage or re-push your application.

To find the current version of Liberty for Java for IBM Cloud being used, from the command-line Cloud Foundry client by running the following commands:

cf ssh <appname> -c “cat staging_info.yml”

Look for similar lines:

{“detected_buildpack”:“Liberty for Java™ (WAR, liberty-xxx, v3.75-20221012-1015, xxx, env)“,”start_command”:“.liberty/initial_startup.rb”}

To re-stage your application using the command-line Cloud Foundry client, use the following command:

cf restage <appname>

To re-push your application using the command-line Cloud Foundry client, use the following command:

cf push <appname>

Workarounds and Mitigations

None