Bug 1961505 (CVE-2021-29951)

Summary: CVE-2021-29951 Mozilla: Thunderbird Maintenance Service could have been started or stopped by domain users
Product: [Other] Security Response Reporter: Doran Moppert <dmoppert>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: erack, jhorak, nobody, stransky, tpopela
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Fixed In Version: thunderbird 78.10.1 Doc Type: If docs needed, set a value
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Last Closed: 2021-05-26 11:32:42 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Doran Moppert 2021-05-18 06:25:31 UTC 
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.*



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2021-19/#CVE-2021-29951
Comment 1 Product Security DevOps Team 2021-05-26 11:32:42 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-29951