This security advisory describes one low risk vulnerability.
Exploit availability: NoDescription
The vulnerability allows a local user to bypass implemented security restrictions.
The vulnerability exists due to the way Mozilla Maintenance Service is installed in the Windows operating system. After installation the Mozilla Maintenance Service is granted SERVICE_START access to
BUILTIN|Users which, in a domain network, grants normal remote users access to start or stop the service. A local domain user can spam the "Stop" command and prevent the browser update service from operating.
The vulnerability affects only Firefox ESR installed on operating system Windows 10 build 1709 and older.
Install update from vendor's website.
Mozilla Thunderbird: 78.0, 78.0.1, 78.1.0, 78.1.1, 78.2.0, 78.2.1, 78.2.2, 78.3.0, 78.3.1, 78.3.2, 78.3.3, 78.4.0, 78.4.1, 78.4.2, 78.4.3, 78.5.0, 78.5.1, 78.6.0, 78.6.1, 78.7.0, 78.7.1, 78.8.0, 78.8.1, 78.9.0, 78.9.1, 78.10.0CPE
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.