Mozilla Foundation Security Advisory 2021-19
Security Vulnerabilities fixed in Thunderbird 78.10.1
- Announced
- May 4, 2021
- Impact
- moderate
- Products
- Thunderbird
- Fixed in
-
- Thunderbird 78.10.1
#CVE-2021-29951: Thunderbird Maintenance Service could have been started or stopped by domain users
- Reporter
- James Forshaw
- Impact
- moderate
Description
The Maintenance Service granted SERVICE_START access to BUILTIN|Users which, in a domain network, grants normal remote users access to start or stop the service. This could be used to prevent the browser update service from operating (if an attacker spammed the 'Stop' command); but also exposed attack surface in the maintenance service.
Note: This issue only affected Windows operating systems older than Win 10 build 1709. Other operating systems are unaffected.