Security Bulletin: Weaker than expected security in WebSphere Application Server (CVE-2018-1719)

Security Bulletin

Summary

There is a potential for weaker than expected security in WebSphere Application Server which could result in TLS downgrade under certain conditions. This only applies if FIPS is enabled and the keystores/truststores are configured by the JVM property com.ibm.ssl.protocol.

Vulnerability Details

CVEID: CVE-2018-1719
DESCRIPTION: IBM WebSphere Application Server could provide weaker than expected security under certain conditions. This could result in a downgrade of TLS protocol. A remote attacker could exploit this vulnerability to perform man-in-the-middle attacks.
CVSS Base Score: 5.9
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/147292 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

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

Version 9.0
Version 8.5

Remediation/Fixes

The recommended solution is to apply the interim fix, Fix Pack or PTF containing APAR PI98768 for each named product as soon as practical.

For WebSphere Application Server traditional and WebSphere Application Server Hypervisor Edition:
For V9.0.0.0 through 9.0.0.8:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI98768
--OR--
· Apply Fix Pack 9.0.0.9 or later.

For V8.5.0.0 through 8.5.5.14:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI98768

--OR--
· Apply Fix Pack 8.5.5.15 or later.

Get Notified about Future Security Bulletins

Subscribe to My Notifications to be notified of important product support alerts like this.

References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Change History

12 September 2018: 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.

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Component":"","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF010","label":"HP-UX"},{"code":"PF012","label":"IBM i"},{"code":"PF016","label":"Linux"},{"code":"PF027","label":"Solaris"},{"code":"PF033","label":"Windows"},{"code":"PF035","label":"z\/OS"}],"Version":"9.0 8.5","Edition":"Advanced;Base;Developer;Enterprise;Express;Network Deployment","Line of Business":{"code":"LOB45","label":"Automation"}}]

Tips

Security Bulletin: Weaker than expected security in WebSphere Application Server (CVE-2018-1719)