{"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":"-0001-11-30T06:00:00","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":"<strong>CVE-2024-21614: Unusual Condition Check Vulnerability Leading to Denial of Service in Juniper Networks Junos OS and Junos OS Evolved<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>This report discusses a significant vulnerability, CVE-2024-21614, that affects the Routing Protocol Daemon (RPD) of Juniper Networks&#8217; 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<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2024-21614<br \/>\nSeverity: High (7.5 CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Potential system compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3446757757\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>Juniper Networks Junos OS | 22.2 versions earlier than 22.2R2-S2, 22.2R3; 22.3 versions earlier than 22.3R2, 22.3R3<br \/>\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<p><strong>How the Exploit Works<\/strong><\/p>\n<p>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<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2169026959\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>A malicious attacker may exploit this vulnerability by sending this<br \/>\n<strong>conceptual<\/strong><br \/>\n HTTP POST request:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/drend\/query HTTP\/1.1\nHost: target.juniper.net\nContent-Type: application\/netconf\n{ &quot;query&quot;: &quot;specific_query_causing_crash&quot; }<\/code><\/pre>\n<p>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":"<p>Overview This report discusses a significant vulnerability, CVE-2024-21614, that affects the Routing Protocol Daemon (RPD) of Juniper Networks&#8217; 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 [&hellip;]<\/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,"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":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/86118","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=86118"}],"version-history":[{"count":0,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/86118\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=86118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=86118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=86118"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=86118"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=86118"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=86118"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=86118"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=86118"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=86118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}