Security Bulletin: IBM CICS TX Advanced is vulnerable to spoofing due to a flaw in Eclipse Paho, used by IBM WebSphere Application Server Liberty (CVE-2019-11777)

Security Bulletin

Summary

WebSphere Application Server Liberty is used by IBM CICS TX Advanced to provide a web based administration console. The fix removes the spoofing vulnerability CVE-2019-11777 from Liberty.

Vulnerability Details

CVEID: CVE-2019-11777
DESCRIPTION: Eclipse Paho Java client could allow a remote attacker to bypass security restrictions, caused by the failure to check the result when connecting to an MQTT server using TLS and setting a host name verifier. By sending a specially-crafted request, an attacker could exploit this vulnerability to allow one MQTT server to impersonate another and provide the client library with incorrect information.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/167068 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

Affected Products and Versions

Affected Product(s)	Version(s)
IBM CICS TX Advanced	10.1
IBM CICS TX Advanced	11.1

Remediation/Fixes

IBM strongly recommends addressing the vulnerability by downloading and applying the interim fixes from the table below

Product	Version	Defect	Remediation / First Fix
IBM CICS TX Advanced	11.1	127796	Download fix from here
IBM CICS TX Advanced	10.1	127796	Download fix from here

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

22 Sep 2022: Initial Publication

*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: IBM CICS TX Advanced is vulnerable to spoofing due to a flaw in Eclipse Paho, used by IBM WebSphere Application Server Liberty (CVE-2019-11777)