Security Bulletin: IBM PowerVM Novalink is vulnerable because IBM WebSphere Application Server Liberty vulnerable, Eclipse Paho Java client could allow a remote attacker to bypass security restrictions.

Summary

BM PowerVM Novalink is vulnerable because IBM WebSphere Application Server Liberty vulnerable, 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.(CVE-2019-11777)

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

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Remediation/Fixes

IBM strongly recommends addressing the vulnerability now by upgrading based on the table below.

Update to pvm-novalink 2.0.1-220908

or

Update to pvm-novalink_2.0.3.1.1-220923

PowerVM Novalink| 2.0.1|

Update to pvm-novalink 2.0.1-220908

or

Update to pvm-novalink_2.0.3.1.1-220923

PowerVM Novalink| 2.0.2| Update to pvm-novalink_2.0.3.1.1-220923
PowerVM Novalink| 2.0.2.1| Update to pvm-novalink_2.0.3.1.1-220923
PowerVM Novalink| 2.0.3| Update to pvm-novalink_2.0.3.1.1-220923
PowerVM Novalink| 2.0.3.1| Update to pvm-novalink_2.0.3.1.1-220923

Workarounds and Mitigations

None