Security Bulletin: WebSphere Application Server is vulnerable to Information Disclosure (CVE-2021-29842)

Summary

WebSphere Application Server configured with a federated repository is vulnerable to information disclosure. This has been addressed.

Vulnerability Details

CVEID:CVE-2021-29842
**DESCRIPTION:**IBM WebSphere Application Server could allow a remote user to enumerate usernames due to a difference of responses from valid and invalid login attempts.
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/205202 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

Affected Products and Versions

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 Liberty 17.0.0.3 - 21.0.0.9 using the federatedRegistry-1.0 feature:

· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH38929
--OR–
· Apply Fix Pack 21.0.0.10 or later (targeted availability 4Q2021).

For WebSphere Application Server traditional and WebSphere Application Server Hypervisor Edition:

For V9.0.0.0 through 9.0.5.9:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH38929
--OR–
· Apply Fix Pack 9.0.5.10 or later (targeted availability 4Q2021).

For V8.5.0.0 through 8.5.5.20:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH38929
--OR–
· Apply Fix Pack 8.5.5.21 or later (targeted availability 1Q2022).

For V8.0.0.0 through 8.0.0.15:
· Upgrade to 8.0.0.15 and then apply Interim Fix PH38929

For V7.0.0.0 through 7.0.0.45:
· Upgrade to 7.0.0.45 and then apply Interim Fix PH38929

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

WebSphere Application Server V7.0 and V8.0 are no longer in full support; IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Workarounds and Mitigations

None