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CVE-2023-3072 : Vulnerability Insights and Analysis

Learn about CVE-2023-3072 affecting HashiCorp's Nomad and Nomad Enterprise. Mitigate risks through immediate patching and long-term security practices.

This CVE, assigned by HashiCorp, involves Nomad ACL Policies without labels being applied to unexpected resources.

Understanding CVE-2023-3072

The vulnerability identified as CVE-2023-3072 affects HashiCorp's Nomad and Nomad Enterprise versions 0.7.0 up to 1.5.6 and 1.4.10, where ACL policies using a block without a label can lead to unexpected outcomes. The issue is resolved in versions 1.6.0, 1.5.7, and 1.4.11.

What is CVE-2023-3072?

CVE-2023-3072 is categorized as CWE-862 - Improper Access Control, where Nomad ACL policies may not behave as expected when a block without a label is utilized, potentially resulting in unauthorized access to resources.

The Impact of CVE-2023-3072

The impact of this vulnerability (CAPEC-1) lies in unauthorized access to functionality that should be constrained by Access Control Lists (ACLs). Exploitation of this weakness could lead to security breaches and data compromise within affected systems.

Technical Details of CVE-2023-3072

The following technical details outline the vulnerability, affected systems, and the mechanism of exploitation:

Vulnerability Description

The vulnerability arises from the improper handling of ACL policies in HashiCorp's Nomad and Nomad Enterprise versions, allowing unexpected resource access when ACL blocks lack labels.

Affected Systems and Versions

        Affected Platforms: 64 bit, 32 bit, x86, ARM, MacOS, Windows, Linux
        Affected Versions:
              Nomad: 0.7.0 up to 1.5.6 and 1.4.10
              Nomad Enterprise: 0.7.0 up to 1.5.6 and 1.4.10
        Unaffected Versions: Nomad 1.6.0, 1.5.7, and Nomad Enterprise 1.4.11

Exploitation Mechanism

The vulnerability can be exploited by crafting ACL policies with blocks that lack appropriate labels, allowing threat actors to bypass intended access controls and gain unauthorized entry to resources.

Mitigation and Prevention

To mitigate the risks associated with CVE-2023-3072, it is crucial to take immediate steps, adopt long-term security practices, and prioritize patching and updates.

Immediate Steps to Take

        Update Nomad and Nomad Enterprise to the patched versions 1.6.0, 1.5.7, and 1.4.11 to address the vulnerability.
        Review and adjust Nomad ACL policies to ensure that all blocks are properly labeled and access controls are correctly configured.

Long-Term Security Practices

        Regularly monitor and audit ACL policies and access controls within Nomad deployments.
        Conduct security training and awareness programs for personnel involved in configuring and managing Nomad environments.

Patching and Updates

Stay informed about security updates and patches released by HashiCorp for Nomad and Nomad Enterprise. Apply updates promptly to ensure that known vulnerabilities are addressed and system security is maintained at all times.

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