Multiple vulnerabilities have been resolved in Message Queuing Telemetry Transport (MQTT) included with Junos by fixing vulnerabilities found during external security research.
 

This issue affects:

Juniper Networks Junos OS

• All versions prior to 19.1R3-S10;
• 19.2 versions prior to 19.2R3-S7;
• 19.3 versions prior to 19.3R3-S8;
• 19.4 versions prior to 19.4R3-S11;
• 20.1 version 20.1R1 and later versions;
• 20.2 versions prior to 20.2R3-S7;
• 20.3 versions prior to 20.3R3-S6;
• 20.4 versions prior to 20.4R3-S7;
• 21.1 versions prior to 21.1R3-S4;
• 21.2 versions prior to 21.2R3-S5;
• 21.3 versions prior to 21.3R3-S4;
• 21.4 versions prior to 21.4R3-S4;
• 22.1 versions prior to 22.1R3;
• 22.2 versions prior to 22.2R3;
• 22.3 versions prior to 22.3R2.

Juniper Networks Junos OS Evolved

• All versions prior to 20.4R3-S7-EVO;
• 21.1 version 21.1R1-EVO and later versions;
• 21.2 version 21.2R1-EVO and later versions;
• 21.3 version 21.3R1-EVO and later versions;
• 21.4 versions prior to 21.4R3-S4-EVO;
• 22.1 versions prior to 22.1R3-EVO;
• 22.2 versions prior to 22.2R3-EVO;
• 22.3 versions prior to 22.3R2-EVO.

To be exposed to these vulnerabilities the following configuration needs to be present:

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

These issues were discovered during external security research.

Important security vulnerabilities resolved in this release include:

The following software releases have been updated to resolve this specific issue:

Junos OS Evolved: 20.4R3-S7-EVO, 21.4R3-S4-EVO, 22.1R3-EVO, 22.2R3-EVO, 22.3R2-EVO, 22.4R1-EVO, and all subsequent releases;

Junos OS: 19.1R3-S10, 19.2R3-S7, 19.3R3-S8, 19.4R3-S11, 20.2R3-S7, 20.3R3-S6, 20.4R3-S7, 21.1R3-S4, 21.2R3-S5, 21.3R3-S4, 21.4R3-S4, 22.1R3, 22.2R3, 22.3R2, 22.4R1, and all subsequent releases.

This issue is being tracked as 1651519

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

There are no known workarounds for these issues.

As a Best Common Practice (BCP) use access lists or firewall filters to limit access to the device to only trusted hosts, networks and administrators.

2023-07-12: Initial Publication

• KB16613: Overview of the Juniper Networks SIRT Quarterly Security Bulletin Publication Process [juniper.net]
• KB16765: In which releases are vulnerabilities fixed? [juniper.net]
• KB16446: Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories [juniper.net]
• Report a Security Vulnerability - How to Contact the Juniper Networks Security Incident Response Team