Terraform Enterprise VCS Module Path Traversal

Executive Summary

This vulnerability exists in HashiCorp Terraform Enterprise's version control system ingestion of registry modules. It occurs because the system does not properly enforce boundaries on the packaged module content. As a result, an authenticated user can include files from outside the intended repository content within a module.

This flaw allows the user to download files that should not be accessible, potentially exposing sensitive files that are readable by the ingestion process.

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Detection Guidance

This vulnerability involves the version control system (VCS) ingestion of registry modules in HashiCorp Terraform Enterprise, allowing authenticated users with module publishing permissions to include and download files outside the intended repository content.

Detection involves verifying whether your Terraform Enterprise instance is running a vulnerable version (v202506-1, v202507-1, or any version from 1.0.0 through 2.0.3) and checking if unauthorized or suspicious module publishing activity is occurring.

Since the vulnerability requires module publishing permissions, you can audit user permissions to identify users who can publish modules.

There are no specific commands provided in the available resources to detect exploitation attempts or scan for this vulnerability directly.

Recommended steps include:

• Check the Terraform Enterprise version to confirm if it is vulnerable.
• Audit user permissions for module publishing capabilities.
• Review logs for unusual module publishing or download activity that might indicate exploitation.

To check the Terraform Enterprise version, you might use commands or API calls specific to your deployment environment, but no explicit commands are provided in the resources.

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Impact Analysis

The vulnerability can lead to unauthorized exposure of sensitive files. An authenticated user could exploit this issue to access files outside the intended module repository, which might contain confidential or sensitive information.

This exposure could compromise the confidentiality of data within your Terraform Enterprise environment.

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Compliance Impact

This vulnerability allows an authenticated user to include and download files from outside the intended repository content, potentially exposing sensitive files readable by the ingestion process.

Exposure of sensitive files could lead to non-compliance with data protection regulations such as GDPR and HIPAA, which require strict controls on access to sensitive data.

Therefore, if exploited, this vulnerability may result in unauthorized disclosure of sensitive information, impacting compliance with these common standards and regulations.

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Mitigation Strategies

To mitigate this vulnerability, you should upgrade HashiCorp Terraform Enterprise to version 2.0.4 or 1.2.4, where the issue has been fixed.

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