CVE-2021-29951

Summary

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.

Affected Software

VendorProductVersion RangeStatus
MozillaThunderbirdunspecified < 78.10.1affected
MozillaFirefoxunspecified < 87affected
MozillaFirefox ESRunspecified < 78.10.1affected

Weaknesses

  • Mozilla Maintenance Service could have been started or stopped by domain users

ADP Enrichment

CVE Program Container

Additional References

References