Summary

There is a potential code execution vulnerability in OpenID connect in WebSphere Application Server Liberty.

Vulnerability Details

CVEID: CVE-2018-1851 DESCRIPTION: IBM WebSphere Application Server OpenID Connect could allow a remote attacker to execute arbitrary code on the system, caused by improper deserialization. By sending a specially-crafted request to the RP service, an attacker could exploit this vulnerability to execute arbitrary code.
CVSS Base Score: 7.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/150999&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

Affected Products and Versions

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

• Liberty

Remediation/Fixes

To patch an existing service instance, refer to the IBM WebSphere Application Server bulletins listed below:

Security Bulletin: Code execution vulnerability with OpenID connect in WebSphere Application Server Liberty (CVE-2018-1851)

Please see Updating your environment for information on applying service.

Workarounds and Mitigations

None.

Monitor IBM Cloud Status for Future Security Bulletins

Monitor the security notifications on the IBM Cloud Status page to be advised of future security bulletins.

References

Complete CVSS v3 Guide
On-line Calculator v3

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

28 November 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.

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