Security Bulletin: Potential denial of service vulnerability in WebSphere Application Server (CVE-2019-4046)

Summary

There is a potential denial of service vulnerability in WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2019-4046 DESCRIPTION: IBM WebSphere Application Server is vulnerable to a denial of service, caused by improper handling of request headers. A remote attacker could exploit this vulnerability to cause the consumption of Memory.
CVSS Base Score: 5.9
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/156242&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

This vulnerability affects the following versions and releases of IBM WebSphere Application Server:

• Liberty
• Version 9.0
• Version 8.5
• Version 8.0
• Version 7.0

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 PH06340
--OR–
· Apply Fix Pack 19.0.0.4 or later (targeted availability 2Q 2019).

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

For V9.0.0.0 through 9.0.0.10:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH06340
--OR–
· Apply Fix Pack 9.0.0.11 or later (targeted availability 2Q 2019).

For V8.5.0.0 through 8.5.5.15

· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH06340
--OR–
· Apply Fix Pack 8.5.5.16 or later (targeted availability 3Q 2019).

For V8.0.0.0 through 8.0.0.15:
· Upgrade to v8.0.0.15 and then apply Interim Fix PH06340

For V7.0.0.0 through 7.0.0.45:
· Upgrade to 7.0.0.45 and then apply Interim Fix PH06340

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