{"id":102262,"date":"2021-11-10T21:36:39","date_gmt":"2021-11-10T19:36:39","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-samba-ustraneno-8-opasnyh-uyazvimostej"},"modified":"2021-11-10T21:36:39","modified_gmt":"2021-11-10T19:36:39","slug":"v-samba-ustraneno-8-opasnyh-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/nl\/blog\/news\/v-samba-ustraneno-8-opasnyh-uyazvimostej","title":{"rendered":"In Samba zijn 8 ernstige kwetsbaarheden verholpen","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Correcties van de Samba-pakketten 4.15.2, 4.14.10 en 4.13.14 zijn gepubliceerd, waarmee 8 kwetsbaarheden zijn verholpen, waarvan de meeste kunnen leiden tot een volledige compromis van het Active Directory-domein. Opmerkelijk is dat \u00e9\u00e9n van de problemen sinds 2016 wordt opgelost, en vijf sinds 2020. Desondanks leidde \u00e9\u00e9n van de correcties tot het niet kunnen opstarten van winbindd bij een configuratie met 'allow trusted domains = no' (de ontwikkelaars zijn van plan snel een andere update met een oplossing uit te brengen). De uitgifte van pakketten in distributies kan worden gevolgd op de pagina's: Debian, Ubuntu, RHEL, SUSE, Fedora, Arch, FreeBSD.    <\/p>\n<p>Verholpen kwetsbaarheden:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2020-25717 \u2014 door een tekortkoming in de logica van het mappen van domeingebruikers naar lokale systeemgebruikers, kon een Active Directory-domeingebruiker, die in staat was nieuwe accounts aan te maken op zijn systeem, beheerd via ms-DS-MachineAccountQuota, rootrechten krijgen op andere systemen die deel uitmaken van <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/nl\/domain\/\"   title=\"domein\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4094\">domein<\/a>.\n<li class=\"l\"> CVE-2021-3738 \u2014 toegang tot een al vrijgegeven geheugenruimte (Use after free) in de implementatie van de RPC-server Samba AD DC (dsdb), wat potentieel kan leiden tot privilege-escalatie bij manipulatie van verbindingsinstellingen.\n<li class=\"l\"> CVE-2016-2124 \u2014 clientverbindingen gemaakt met het SMB1-protocol konden worden omgezet naar het verzenden van authenticatieparameters in platte tekst of via NTLM (bijvoorbeeld om inloggegevens te verkrijgen tijdens MITM-aanvallen), zelfs als verplichte authenticatie via Kerberos was ingesteld voor de gebruiker of applicatie.\n<li class=\"l\"> CVE-2020-25722 \u2014 in de Active Directory-domeincontroller op basis van Samba werden onvoldoende toegang controles uitgevoerd op opgeslagen gegevens, wat het voor elke gebruiker mogelijk maakte om autorisatiecontroles te omzeilen en het domein volledig te compromitteren.\n<li class=\"l\"> CVE-2020-25718 \u2014 in de Active Directory-domeincontroller op basis van Samba werden Kerberos-tickets afgegeven door de RODC (Read-only domain controller) niet correct ge\u00efsoleerd, wat kon worden gebruikt om tickets van de beheerder van de RODC te verkrijgen zonder daartoe bevoegdheid te hebben.\n<li class=\"l\"> CVE-2020-25719 \u2014 de Active Directory domain controller op basis van Samba hield niet altijd rekening met de koppeling van de SID en PAC velden in Kerberos tickets (bij het instellen van \u2018gensec:require_pac = true\u2019 werd alleen de naam gecontroleerd, en werd de PAC niet meegenomen), waardoor een gebruiker met het recht om account te maken op het lokale systeem zich als een andere gebruiker in het domein, inclusief een geprivilegieerde gebruiker, kon voordoen.\n<li class=\"l\"> CVE-2020-25721 \u2014 voor gebruikers die zijn geauthenticeerd met behulp van Kerberos werden niet altijd unieke identificaties voor Active Directory (objectSid) verstrekt, wat zou kunnen leiden tot overlappingen tussen verschillende gebruikers.\n<li class=\"l\"> CVE-2021-23192 \u2014 tijdens het uitvoeren van een MITM-aanval was het mogelijk om fragmenten te vervalsen in grote DCE\/RPC aanvragen, die in meerdere delen worden opgesplitst.  <\/ul>\n<p>Bron: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56132\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.15.2, 4.14.10 \u0438 4.13.14 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 8 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u043e \u0438\u0437 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043c\u043e\u0433\u0443\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043f\u043e\u043b\u043d\u043e\u0439 \u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0435\u0442\u0430\u0446\u0438\u0438 \u0434\u043e\u043c\u0435\u043d\u0430 Active Directory. \u041f\u0440\u0438\u043c\u0435\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u043e, \u0447\u0442\u043e \u043e\u0434\u043d\u0443 \u0438\u0437 \u043f\u0440\u043e\u0431\u043b\u0435\u043c \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u044f\u043b\u0438 \u0441 2016 \u0433\u043e\u0434\u0430, \u0430 \u043f\u044f\u0442\u044c &#8212; \u0441 2020 \u0433\u043e\u0434\u0430, \u0442\u0435\u043c \u043d\u0435 \u043c\u0435\u043d\u0435\u0435 \u043e\u0434\u043d\u043e \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u0438\u0432\u0435\u043b\u043e \u043a \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u044c winbindd \u043f\u0440\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u0438 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 &#171;allow trusted domains [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-102262","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.15.2, 4.14.10 \u0438 4.13.14 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 8 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u043e 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