An Improper Check for Unusual or Exceptional Conditions vulnerability in Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based, unauthenticated attacker to cause rpd to crash, leading to Denial of Service (DoS).

On all Junos OS and Junos OS Evolved platforms, when NETCONF and gRPC are enabled, and a specific query is executed via Dynamic Rendering (DREND), rpd will crash and restart. Continuous execution of this specific query will cause a sustained Denial of Service (DoS) condition.

This issue affects:

Junos OS

• 22.2 versions earlier than 22.2R2-S2, 22.2R3;
• 22.3 versions earlier than 22.3R2, 22.3R3.

Junos OS Evolved

• 22.2 versions earlier than 22.2R2-S2-EVO, 22.2R3-EVO;
• 22.3 versions earlier than 22.3R2-EVO, 22.3R3-EVO.

This issue does not affect:

• Junos OS versions earlier than 22.2R1;
• Junos OS Evolved versions earlier than 22.2R1-EVO.

For this issue to occur, NETCONF and gRPC should be enabled.

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

This issue was seen during production usage.

This issue has been assigned CVE-2024-21614.

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

Junos OS: 22.2R2-S2, 22.2R3, 22.3R2, 22.3R3, 22.4R1, and all subsequent releases.

Junos OS Evolved: 22.2R2-S2-EVO, 22.2R3-EVO, 22.3R2-EVO, 22.3R3-EVO, 22.4R1-EVO, and all subsequent releases.

This issue is being tracked as PR 1697622 which is visible on the Customer Support website.

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

2024-01-10: 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
• CVE-2024-21614 at cve.mitre.org