Security Bulletin: IBM WebSphere Application Server and IBM WebSphere Application Server Liberty are vulnerable to a denial of service due to Apache Commons FileUpload (CVE-2023-24998)

Summary

There is a vulnerability in the Apache Commons FileUpload library used by IBM WebSphere Application Server and used by IBM WebSphere Application Server Liberty with the servlet-3.0, servlet-3.1, servlet-4.0, servlet-5.0 or servlet-6.0 feature enabled. This has been addressed in the remediation section.

Vulnerability Details

CVEID:CVE-2023-24998
**DESCRIPTION:**Apache Commons FileUpload and Tomcat are vulnerable to a denial of service, caused by not limit the number of request parts to be processed in the file upload function. By sending a specially-crafted request with series of uploads, 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/247895 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 PH50863. 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 17.0.0.3 - 23.0.0.3 using the servlet-3.0, servlet-3.1, servlet-4.0, servlet-5.0 or servlet-6.0 feature:

· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH50863
--OR–
· Apply Fix Pack 23.0.0.4 or later (targeted availability 2Q2023).

For IBM WebSphere Application Server traditional:

For V9.0.0.0 through 9.0.5.15:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH50863
--OR–
· Apply Fix Pack 9.0.5.16 or later (targeted availability 2Q2023).

For V8.5.0.0 through 8.5.5.23:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH50863
--OR–
· Apply Fix Pack 8.5.5.24 or later (targeted availability 3Q2023).

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

Workarounds and Mitigations

None