Leon Kayaliev

Velociraptor allows some sensitive artifacts to be gated by additional permissions. For example, the Linux.Sys.BashShell artifact allows arbitrary command execution on endpoints, and so it requires the EXECVE permission to schedule. However, no such check was implemented for client monitoring artifacts. Additionally there was no requirement that client monitoring artifacts carry the CLIENT EVENTS type. This allows any user who can schedule client monitoring artifacts to also schedule otherwise restricted artifacts (such as Linux.Sys.BashShell).

Velociraptor allows for the creation of notebook backups in its default enabled daily backup feature. When Velociraptor restores the backup, the notebook cell content is interpolated into a template with no ACL checks. This allows a malicious user with NOTEBOOK EDITOR permission to plant a VQL query which will be evaluated at elevated permissions if the notebook's backup is subsequently restored.

**Name of the Vulnerable Software and Affected Versions** The product name cannot be determined (affected versions not specified) **Description** An authenticated attacker can spoof the identity of another GUI user by including a custom header `Grpc-Metadata-USER` in their request. This flaw allows a user with low privileges to perform an account takeover and gain administrator access. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.