{"id":86118,"date":"2025-12-24T16:46:09","date_gmt":"2025-12-24T16:46:09","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2024-21614-unusual-condition-check-vulnerability-leading-to-denial-of-service-in-juniper-networks-junos-os-and-junos-os-evolved","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2024-21614-unusual-condition-check-vulnerability-leading-to-denial-of-service-in-juniper-networks-junos-os-and-junos-os-evolved\/","title":{"rendered":"CVE-2024-21614: Unusual Condition Check Vulnerability Leading to Denial of Service in Juniper Networks Junos OS and Junos OS Evolved<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

This report discusses a significant vulnerability, CVE-2024-21614, that affects the Routing Protocol Daemon (RPD) of Juniper Networks’ Junos OS and Junos OS Evolved. The vulnerability allows network-based, unauthenticated attackers to cause service disruptions through continual execution of a specific query. This vulnerability is of significant concern due to the potential for system compromise or data leakage.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2024-21614
\nSeverity: High (7.5 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Juniper Networks Junos OS | 22.2 versions earlier than 22.2R2-S2, 22.2R3; 22.3 versions earlier than 22.3R2, 22.3R3
\nJuniper Networks 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<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit functions by taking advantage of an improper check for unusual or exceptional conditions in the Routing Protocol Daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved. When NETCONF and gRPC are enabled, and a specific query is executed via Dynamic Rendering (DREND), rpd crashes and restarts. This crash process can be repeated to create a sustained Denial of Service (DoS) condition.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

A malicious attacker may exploit this vulnerability by sending this
\nconceptual<\/strong>
\n HTTP POST request:<\/p>\n

POST \/drend\/query HTTP\/1.1\nHost: target.juniper.net\nContent-Type: application\/netconf\n{ \"query\": \"specific_query_causing_crash\" }<\/code><\/pre>\n
This example demonstrates the execution of a specific query via Dynamic Rendering (DREND) that causes rpd to crash and restart, leading to a Denial of Service (DoS) condition.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview This report discusses a significant vulnerability, CVE-2024-21614, that affects the Routing Protocol Daemon (RPD) of Juniper Networks’ Junos OS and Junos OS Evolved. The vulnerability allows network-based, unauthenticated attackers to cause service disruptions through continual execution of a specific query. This vulnerability is of significant concern due to the potential for system compromise or […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-86118","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t