CVE-2021-29951

medium

Description

The Mozilla 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.*. This vulnerability affects Thunderbird < 78.10.1, Firefox < 87, and Firefox ESR < 78.10.1.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1690062

https://www.mozilla.org/security/advisories/mfsa2021-10/

https://www.mozilla.org/security/advisories/mfsa2021-19/

https://www.mozilla.org/security/advisories/mfsa2021-18/

Details

Source: MITRE

Published: 2021-06-24

Updated: 2022-07-12

Type: CWE-269

Risk Information

CVSS v2

Base Score: 6.4

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N

Impact Score: 4.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 6.5

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

Impact Score: 2.5

Exploitability Score: 3.9

Severity: MEDIUM