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 it an issue that demands immediate attention and resolution.
Vulnerability Summary
CVE ID: CVE-2025-4922
Severity: High (8.1 CVSS Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Risk of system compromise and data leakage
Affected Products
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Product | Affected Versions
Nomad Community Edition | Prior to 1.10.2
Nomad Enterprise | Prior to 1.10.2, 1.9.10, and 1.8.14
How the Exploit Works
This exploit takes advantage of a flaw in Nomad’s ACL policy lookup mechanism. An attacker can manipulate the prefix-based ACL policy lookup to apply incorrect rules, resulting in potential rule shadowing. This loophole can grant the attacker unauthorized access to sensitive data or even control over the affected system.
Conceptual Example Code
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:
POST /nomad/vulnerable/policy/lookup HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "acl_policy": "malicious_prefix" }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 or privileges.
Mitigation Guidance
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, 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. Nevertheless, these should be supplementary measures until the patch can be applied to fully secure the system from this threat.
In conclusion, vigilance and prompt action are vital in managing cybersecurity threats. It’s crucial to stay informed about vulnerabilities like CVE-2025-4922 and take immediate corrective actions to keep your systems secure.