Vulnerability Description
A privilege escalation vulnerability impacting the Google Exposure Notification Verification Server (versions prior to 0.23.1), allows an attacker who (1) has UserWrite permissions and (2) is using a carefully crafted request or malicious proxy, to create another user with higher privileges than their own. This occurs due to insufficient checks on the allowed set of permissions. The new user creation event would be captured in the Event Log.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Exposure Notifications Verification Server | < 0.23.1 |
Related Weaknesses (CWE)
References
- https://github.com/google/exposure-notifications-verification-server/commit/eb8cPatchThird Party Advisory
- https://github.com/google/exposure-notifications-verification-server/releases/taRelease NotesThird Party Advisory
- https://github.com/google/exposure-notifications-verification-server/releases/taRelease NotesThird Party Advisory
- https://github.com/google/exposure-notifications-verification-server/security/adThird Party Advisory
- https://github.com/google/exposure-notifications-verification-server/commit/eb8cPatchThird Party Advisory
- https://github.com/google/exposure-notifications-verification-server/releases/taRelease NotesThird Party Advisory
- https://github.com/google/exposure-notifications-verification-server/releases/taRelease NotesThird Party Advisory
- https://github.com/google/exposure-notifications-verification-server/security/adThird Party Advisory
FAQ
What is CVE-2021-22538?
CVE-2021-22538 is a vulnerability with a CVSS score of 6.3 (MEDIUM). A privilege escalation vulnerability impacting the Google Exposure Notification Verification Server (versions prior to 0.23.1), allows an attacker who (1) has UserWrite permissions and (2) is using a ...
How severe is CVE-2021-22538?
CVE-2021-22538 has been rated MEDIUM with a CVSS base score of 6.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-22538?
Check the references section above for vendor advisories and patch information. Affected products include: Google Exposure Notifications Verification Server.