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GHSA-5v95-v8c8-3rh6

Privilege escalation in rbac

Source: GitHub Advisory Database (reviewed) High CVE-2021-22538

Packages

EcosystemPackageAffectedFixed in
Go github.com/google/exposure-notifications-verification-server < 0.23.1 0.23.1

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact Using a carefully crafted request or malicious proxy, a user with `UserWrite` permissions could create another user with higher privileges than their own due to insufficient checks on the allowed set of permissions. The event would be captured in the Event Log. ### Patches The issue has been fixed in 0.24.0 and 0.23.1. ### Workarounds For users who are unable to upgrade, we recommend auditing users who have `UserWrite` permissions and regularly reviewing the Event Log for malicious activity. ### Kudos Thank you to Michael Mazzolini (Ethical Hacker at WHO) for finding and disclosing this vulnerability.

References

External links from the advisory. They lead to third-party sites.