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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1506 Mozilla Foundation Security Advisory 2021-18S: Security Vulnerabilities fixed in Firefox ESR 78.10.1 5 May 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Firefox ESR Publisher: Mozilla Operating System: Windows Impact/Access: Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-29951 Original Bulletin: https://www.mozilla.org/en-US/security/advisories/mfsa2021-18/ - --------------------------BEGIN INCLUDED TEXT-------------------- Mozilla Foundation Security Advisory 2021-18 Security Vulnerabilities fixed in Firefox ESR 78.10.1 Announced: May 4, 2021 Impact: moderate Products: Firefox ESR Fixed in: Firefox ESR 78.10.1 # CVE-2021-29951: Mozilla Maintenance Service could have been started or stopped by domain users Reporter: James Forshaw Impact: moderate 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. References o Bug 1690062 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYJHWhONLKJtyKPYoAQhDkQ//XpfjGYK7621jlJAO/Vuhjm1lLnWsVKl3 bRXP9tdww3X9ImWta9K/9Ps1ircoRH6bJQPf/O3DUwjjqG8JsJU8HWvG7XVjIUH6 4HcnHRAmeUfEB+owmajo9z3z6RnTMTePyI4Pjm/69fA7euwoQPFUWD5PP+4N2KG0 +sXFQha6WNuVEqBj1dY2WoYZzx/RsRdG8VmX+6P0x1qHto5dPwaj2NoZMlTUyOQb +ps1S610LF0NbbOezeQI0st7uB1Kkeq8yfvEY3wF0qUlWQSwXc787YPkAN16wBuM IQfQc7zU++/g8LppnM/wxe8Lr1cb/X0KPtMA9ocewpDxAbnGbcL7vECfAg+594tA INZkkR0ucjNUFjw3dOwTuQ0qy0LRYhPK7Rf5Nwnr/cIlQf34++goFSzb4VuZOeyQ cYoQOKoVrYLsATdClH0eTAwvNw+Ezmx0v5orgUtFeqp4P+wEz4qoPMWOFgBTtApZ HB2f//q0x4T2z1IbbyECV6EKfWQkqnIE0wU/ACevu1EqWM9NnfjIWD0euAj6RoFr kw/AFjm5plep/GfRw262U8wQ6jmEpxqa+kGa9A0QR9JmndqNVcN6fnhqm2k71xjG stezDvZlU6774Ynvq8bWlcX1Q3d7DRybP46GIgHOtqRQiQ2o1LlQR0SrSS0DkQqf RULybdFCGcQ= =CwTv -----END PGP SIGNATURE-----