CVE-2021-21396 Information

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 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Reference

https://github.com/wireapp/wire-server/security/advisories/GHSA-qx8q-rhq2-rg4j https://github.com/wireapp/wire-server/releases/tag/v2021-03-02 https://github.com/wireapp/wire-server/commit/7ba2bf4140282557cf215e0b2c354d4d08cd3421

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

6.5