{"id":55258,"date":"2025-06-27T00:07:01","date_gmt":"2025-06-27T00:07:01","guid":{"rendered":""},"modified":"2025-10-03T12:32:28","modified_gmt":"2025-10-03T18:32:28","slug":"cve-2025-4922-nomad-acl-policy-lookup-vulnerability","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4922-nomad-acl-policy-lookup-vulnerability\/","title":{"rendered":"<strong>CVE-2025-4922: Nomad ACL Policy Lookup Vulnerability<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>We are discussing today a significant vulnerability found in Nomad Community and Nomad Enterprise, a crucial software utilized by numerous organizations for their day-to-day operations. This vulnerability, known as CVE-2025-4922, exposes systems to potential compromise and data leakage, posing a serious cybersecurity threat to affected entities. Its presence in a widely used software makes it an issue that demands immediate attention and resolution.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4922<br \/>\nSeverity: High (8.1 CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52709-high-risk-deserialization-of-untrusted-data-vulnerability-in-everest-forms\/\"  data-wpil-monitor-id=\"65275\">Risk of system compromise and data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2598674897\" 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>Nomad <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50567-critical-sql-injection-vulnerability-in-saurus-cms-community-edition-4-7-1\/\"  data-wpil-monitor-id=\"79250\">Community Edition<\/a> | Prior to 1.10.2<br \/>\nNomad Enterprise | Prior to 1.10.2, 1.9.10, and 1.8.14<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>This exploit takes advantage of a flaw in Nomad\u2019s ACL policy lookup mechanism. An attacker can manipulate the prefix-based ACL policy lookup to apply incorrect rules, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30404-integer-overflow-vulnerability-in-executorch-resulting-in-potential-system-compromise\/\"  data-wpil-monitor-id=\"75975\">resulting in potential<\/a> rule shadowing. This loophole can grant the attacker <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49181-unauthorized-api-endpoint-access-leading-to-denial-of-service-and-data-leakage\/\"  data-wpil-monitor-id=\"61703\">unauthorized access to sensitive data<\/a> or even control over the affected system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3417739332\" 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>Here&#8217;s a conceptual example of how this vulnerability might be exploited. This example uses a hypothetical <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6162-critical-buffer-overflow-vulnerability-in-totolink-ex1200t-http-post-request-handler\/\"  data-wpil-monitor-id=\"62864\">HTTP request that could be used to trigger the vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/nomad\/vulnerable\/policy\/lookup HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;acl_policy&quot;: &quot;malicious_prefix&quot; }<\/code><\/pre>\n<p>In this example, an attacker sends a POST request with a maliciously crafted &#8220;acl_policy&#8221; value. Since the Nomad system incorrectly applies rules based on this manipulated prefix, the attacker can gain <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5071-unauthorized-access-and-data-modification-vulnerability-in-ai-engine-wordpress-plugin\/\"  data-wpil-monitor-id=\"62862\">unauthorized access<\/a> or privileges.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>To mitigate this vulnerability, users are strongly recommended to apply the vendor patch released with versions 1.10.2, 1.9.10, and 1.8.14 of Nomad Community <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30749-oracle-java-se-and-graalvm-enterprise-edition-high-risk-vulnerability\/\"  data-wpil-monitor-id=\"76262\">Edition and Nomad Enterprise<\/a>, respectively. As a temporary solution, employing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help detect and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49155-uncontrolled-search-path-vulnerability-in-trend-micro-apex-one-data-loss-prevention-module\/\"  data-wpil-monitor-id=\"62863\">prevent exploitation of this vulnerability<\/a>. Nevertheless, these should be supplementary measures until the patch can be applied to fully <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20217-denial-of-service-vulnerability-in-snort-3-detection-engine-of-cisco-secure-firewall-threat-defense-software\/\"  data-wpil-monitor-id=\"77091\">secure the system from this threat<\/a>.<br \/>\nIn conclusion, vigilance and prompt action are vital in managing <a href=\"https:\/\/www.ameeba.com\/blog\/introducing-the-ameeba-cybersecurity-group-chat\/\"  data-wpil-monitor-id=\"88413\">cybersecurity<\/a> threats. It&#8217;s crucial to stay <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45620-remote-information-disclosure-vulnerability-in-aver-ptc310uv2\/\"  data-wpil-monitor-id=\"70196\">informed about vulnerabilities<\/a> like CVE-2025-4922 and take immediate corrective actions to keep your systems secure.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview We are discussing today a significant vulnerability found in Nomad Community and Nomad Enterprise, a crucial software utilized by numerous organizations for their day-to-day operations. This vulnerability, known as CVE-2025-4922, exposes systems to potential compromise and data leakage, posing a serious cybersecurity threat to affected entities. Its presence in a widely used software makes [&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":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-55258","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/55258","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=55258"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/55258\/revisions"}],"predecessor-version":[{"id":81225,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/55258\/revisions\/81225"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=55258"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=55258"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=55258"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=55258"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=55258"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=55258"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=55258"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=55258"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=55258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}