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Security Bulletin: IBM WebSphere Application Server Liberty is vulnerable to spoofing due to Eclipse Paho (CVE-2019-11777)

Security Bulletin


Summary

There is a vulnerability in the Eclipse Paho library used by IBM WebSphere Application Server Liberty with the rtcomm-1.0 or rtcommGateway-1.0 feature enabled. This has been addressed.

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 WebSphere Application Server Liberty17.0.0.3 - 22.0.0.7

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the APAR PH45750. To determine if a feature is enabled for IBM WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature. 

For IBM WebSphere Application Server Liberty 17.0.0.3 - 22.0.0.7 using the rtcomm-1.0 or rtcommGateway-1.0 feature(s): 
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH45750
--OR--
· Apply Liberty Fix Pack 22.0.0.8 or later (targeted availability 3Q2022).

Additional interim fixes may be available and linked off the interim fix download page.

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

To determine if a feature is enabled for IBM WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature. 

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

7 Jul 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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Document Information

Modified date:
07 July 2022

UID

ibm16602039

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