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

Security Bulletin

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 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.

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

21 March 2019: original document published

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Tips

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