Security Bulletin: WebSphere Application Server is vulnerable to a denial of service (CVE-2019-4720)

Summary

There is a denial of service vulnerablility in WebSphere Application Server.

Vulnerability Details

CVEID:CVE-2019-4720
**DESCRIPTION:**IBM WebSphere Application Server is vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume all available memory.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/172125 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

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:

· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH19528
--OR–
· Apply Fix Pack 20.0.0.2 or later (targeted availability 1Q2020).

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

For V9.0.0.0 through 9.0.5.2:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH19528
--OR–
· Apply Fix Pack 9.0.5.3 or later (targeted availability 1Q2020).

For V8.5.0.0 through 8.5.5.17:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH19528
--OR–
· Apply Fix Pack 8.5.5.18 or later (targeted availability 3Q2020).

For V8.0.0.0 through 8.0.0.15:
· Upgrade to 8.0.0.15 and then apply Interim Fix PH19528

For V7.0.0.0 through 7.0.0.45:
· Upgrade to 7.0.0.45 and then apply Interim Fix PH19528

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