Horizon Alert
Summary of the vulnerability and why it matters
This advisory addresses a critical vulnerability in Vitest, a testing framework. The issue allows unauthenticated access to sensitive local files and the creation or deletion of files within the Vitest process, even when write permissions are restricted. This could have significant implications for the integrity and confidentiality of data handled by the testing environment.
- Affects Vitest testing framework file handling.
- Matters for protecting local files and process integrity.
- Confirm relevance and exposure of testing environments.
Attack Path
How an attacker could exploit the issue
An attacker could exploit this vulnerability by interacting with Vitest's Browser Mode API. This API normally handles browser-based testing commands, but it fails to properly check file path permissions. An attacker who can reach this API could trick Vitest into reading, writing, or deleting files on the system where Vitest is running, regardless of whether write access is supposed to be enabled.
- Entry condition: Unauthenticated network access to Browser Mode API.
- Trigger point: Specifying arbitrary file paths in API commands.
- Resulting risk: Arbitrary file read, write, or delete.
Live Threat
Current exploitation, exposure, and threat context
When supported by the advisory, the Browser Mode API in Vitest could allow an attacker to read arbitrary local files, create or overwrite image and trace files, or delete files accessible to the Vitest process. This could occur when the API is reachable and file path restrictions are not enforced.
- Arbitrary local files and project files.
- Via reachable Browser Mode API.
- Potential unauthorized data access or modification.
Operational Fix
Recommended remediation, mitigation, and detection steps
The primary responsibility for addressing this vulnerability lies with development or platform teams that manage the Vitest testing framework. The immediate practical step is to identify all instances of Vitest within the environment, determine their accessibility, and assess their criticality to business operations before planning any remediation.
- Application or platform teams own the issue.
- Verify Vitest instances and their exposure.
- Plan remediation based on identified risk.
