{"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":"CVE-2025-4922: Nomad ACL Policy Lookup Vulnerability<\/strong>"},"content":{"rendered":"

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

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

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

CVE ID: CVE-2025-4922
\nSeverity: High (8.1 CVSS Score)
\nAttack Vector: Network
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: Risk of system compromise and data<\/a> leakage<\/p>\n

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

Product | Affected Versions<\/p>\n

Nomad Community Edition<\/a> | Prior to 1.10.2
\nNomad Enterprise | Prior to 1.10.2, 1.9.10, and 1.8.14<\/p>\n

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

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, resulting in potential<\/a> rule shadowing. This loophole can grant the attacker unauthorized access to sensitive data<\/a> or even control over the affected system.<\/p>\n

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

Here’s a conceptual example of how this vulnerability might be exploited. This example uses a hypothetical HTTP request that could be used to trigger the vulnerability<\/a>:<\/p>\n

POST \/nomad\/vulnerable\/policy\/lookup HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"acl_policy\": \"malicious_prefix\" }<\/code><\/pre>\n
In this example, an attacker sends a POST request with a maliciously crafted “acl_policy” value. Since the Nomad system incorrectly applies rules based on this manipulated prefix, the attacker can gain unauthorized access<\/a> or privileges.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
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 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 prevent exploitation of this vulnerability<\/a>. Nevertheless, these should be supplementary measures until the patch can be applied to fully secure the system from this threat<\/a>.
\nIn conclusion, vigilance and prompt action are vital in managing cybersecurity<\/a> threats. It’s crucial to stay informed about vulnerabilities<\/a> like CVE-2025-4922 and take immediate corrective actions to keep your systems secure.<\/p>\n","protected":false},"excerpt":{"rendered":"
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 […]<\/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":[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":[],"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