Vulnerability Description
wire-server is an open-source back end for Wire, a secure collaboration platform. In wire-server from version 2021-02-16 and before version 2021-03-02, the client metadata of all users was exposed in the `GET /users/list-clients` endpoint. The endpoint could be used by any logged in user who could request client details of any other user (no connection required) as far as they can find their User ID. The exposed metadata included id, class, type, location, time, and cookie. A user on a Wire backend could use this endpoint to find registration time and location for each device for a given list of users. As a workaround, remove `/list-clients` from nginx config. This has been fixed in version 2021-03-02.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wire | Wire Server | >= 2021-02-16, < 2021-03-02 |
Related Weaknesses (CWE)
References
- https://github.com/wireapp/wire-server/commit/7ba2bf4140282557cf215e0b2c354d4d08PatchThird Party Advisory
- https://github.com/wireapp/wire-server/releases/tag/v2021-03-02Third Party Advisory
- https://github.com/wireapp/wire-server/security/advisories/GHSA-qx8q-rhq2-rg4jPatchThird Party Advisory
- https://github.com/wireapp/wire-server/commit/7ba2bf4140282557cf215e0b2c354d4d08PatchThird Party Advisory
- https://github.com/wireapp/wire-server/releases/tag/v2021-03-02Third Party Advisory
- https://github.com/wireapp/wire-server/security/advisories/GHSA-qx8q-rhq2-rg4jPatchThird Party Advisory
FAQ
What is CVE-2021-21396?
CVE-2021-21396 is a vulnerability with a CVSS score of 6.5 (MEDIUM). wire-server is an open-source back end for Wire, a secure collaboration platform. In wire-server from version 2021-02-16 and before version 2021-03-02, the client metadata of all users was exposed in ...
How severe is CVE-2021-21396?
CVE-2021-21396 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21396?
Check the references section above for vendor advisories and patch information. Affected products include: Wire Wire Server.