Security Bulletin: IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to a denial of service due to jose4j (CVE-2023-51775)

Summary

There is a vulnerability in the jose4j library used by IBM WebSphere Application Server traditional and used by the IBM WebSphere Application Server Liberty.

Vulnerability Details

CVEID:CVE-2023-51775
**DESCRIPTION:**jose4j is vulnerable to a denial of service, caused by improper input validation. By sending a specially crafted p2c value, 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/275907 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 PH60199 and APAR PH60195. To determine if a feature is enabled for WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature.

For IBM WebSphere Application Server Liberty 21.0.0.3 - 24.0.0.3 using the openidConnectClient-1.0, socialLogin-1.0, mpJwt-1.2, mpJwt-2.0, mpJwt-2.1, or jwt-1.0 features:

· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH60199
--OR–
· Apply Fix Pack 24.0.0.4 or later (targeted availability 2Q2024).

For IBM WebSphere Application Server traditional:

For V9.0.0.0 through 9.0.5.19:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH60195
--OR–
· Apply Fix Pack 9.0.5.20 or later (targeted availability 2Q2024).

For V8.5.5.3 through 8.5.5.25:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH60195
--OR–
· Apply Fix Pack 8.5.5.26 or later (targeted availability 3Q2024).

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

Workarounds and Mitigations

None