{"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\/hu\/blog\/news\/v-samba-ustraneno-8-opasnyh-uyazvimostej","title":{"rendered":"A Samba 8 s\u00falyos sebezhet\u0151s\u00e9get jav\u00edtott","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Kiad\u00e1sra ker\u00fclt a Samba 4.15.2, 4.14.10 \u00e9s 4.13.14 csomagok hibajav\u00edt\u00f3 verzi\u00f3ja, amelyek 8 sebezhet\u0151s\u00e9get orvosolnak, amelyek k\u00f6z\u00fcl a legt\u00f6bb teljes kompromitt\u00e1l\u00e1shoz vezethet az Active Directory tartom\u00e1nyban. Meglep\u0151 m\u00f3don az egyik probl\u00e9m\u00e1t m\u00e1r 2016 \u00f3ta jav\u00edtj\u00e1k, \u00e9s \u00f6t\u00f6t 2020 \u00f3ta, azonban egy jav\u00edt\u00e1s miatt lehetetlenn\u00e9 v\u00e1lt a winbindd ind\u00edt\u00e1sa az \"allow trusted domains = no\" be\u00e1ll\u00edt\u00e1s eset\u00e9n (a fejleszt\u0151k sz\u00e1nd\u00e9koznak s\u00fcrg\u0151sen k\u00f6zz\u00e9tenni egy \u00fajabb friss\u00edt\u00e9st a jav\u00edt\u00e1ssal). A disztrib\u00faci\u00f3s csomagok friss\u00edt\u00e9s\u00e9nek nyomon k\u00f6vet\u00e9se a k\u00f6vetkez\u0151 oldalakon lehets\u00e9ges: Debian, Ubuntu, RHEL, SUSE, Fedora, Arch, FreeBSD.    <\/p>\n<p>Elh\u00e1r\u00edtott sebezhet\u0151s\u00e9gek:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2020-25717 \u2014 a domain felhaszn\u00e1l\u00f3k \u00e9s a helyi rendszer felhaszn\u00e1l\u00f3inak lek\u00e9pez\u00e9si logik\u00e1j\u00e1nak hi\u00e1nyoss\u00e1ga miatt az Active Directory tartom\u00e1ny felhaszn\u00e1l\u00f3ja, aki k\u00e9pes \u00faj fi\u00f3kok l\u00e9trehoz\u00e1s\u00e1ra a saj\u00e1t rendszer\u00e9n, amelyeket az ms-DS-MachineAccountQuota ir\u00e1ny\u00edt, root jogosults\u00e1gokkal f\u00e9rhetett hozz\u00e1 m\u00e1s rendszerekhez, amelyek beletartoznak <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/domain\/\"   title=\"domain\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4094\">domain<\/a>.\n<li class=\"l\"> CVE-2021-3738 \u2014 m\u00e1r felszabad\u00edtott mem\u00f3ria ter\u00fclet (Use after free) el\u00e9r\u00e9se a Samba AD DC (dsdb) RPC-szerver\u00e9nek megval\u00f3s\u00edt\u00e1s\u00e1ban, amely potenci\u00e1lisan emelt jogosults\u00e1ghoz vezethet a kapcsolatok be\u00e1ll\u00edt\u00e1s\u00e1nak manipul\u00e1l\u00e1sakor.\n<li class=\"l\"> CVE-2016-2124 \u2014 a SMB1 protokoll haszn\u00e1lat\u00e1val l\u00e9trehozott klienskapcsolatok az autentik\u00e1ci\u00f3s param\u00e9terek ny\u00edlt sz\u00f6vegben vagy NTLM-en kereszt\u00fcli tov\u00e1bb\u00edt\u00e1s\u00e1ra ker\u00fclhettek, p\u00e9ld\u00e1ul az MITM-t\u00e1mad\u00e1sok sor\u00e1n a hiteles\u00edt\u0151 adatok meghat\u00e1roz\u00e1sakor, m\u00e9g akkor is, ha a felhaszn\u00e1l\u00f3 vagy alkalmaz\u00e1s konfigur\u00e1ci\u00f3s be\u00e1ll\u00edt\u00e1sainak k\u00f6telez\u0151 Kerberos-azonos\u00edt\u00e1st \u00edrtak el\u0151.\n<li class=\"l\"> CVE-2020-25722 \u2014 a Samba alap\u00fa Active Directory domainvez\u00e9rl\u0151n nem hajtott\u00e1k v\u00e9gre a megfelel\u0151 hozz\u00e1f\u00e9r\u00e9si ellen\u0151rz\u00e9seket a t\u00e1rolt adatokhoz, lehet\u0151v\u00e9 t\u00e9ve b\u00e1rmely felhaszn\u00e1l\u00f3 sz\u00e1m\u00e1ra, hogy azt megker\u00fclve teljes m\u00e9rt\u00e9kben kompromitt\u00e1lja a domaint.\n<li class=\"l\"> CVE-2020-25718 \u2014 a Samba alap\u00fa Active Directory domainvez\u00e9rl\u0151n nem izol\u00e1lt\u00e1k megfelel\u0151en a RODC (csak olvashat\u00f3 domain vez\u00e9rl\u0151) \u00e1ltal kiadott Kerberos-jegyeket, amelyeket jogosults\u00e1gok n\u00e9lk\u00fcl haszn\u00e1ltak fel a RODC adminisztr\u00e1tori jegyeinek megszerz\u00e9s\u00e9re.\n<li class=\"l\"> CVE-2020-25719 \u2014 Az Active Directory Samba alap\u00fa domain vez\u00e9rl\u0151je nem mindig vette figyelembe a SID \u00e9s PAC mez\u0151ket a Kerberos-jegyekben (a \u201egensec:require_pac = true\u201d be\u00e1ll\u00edt\u00e1s mellett csak a nevet ellen\u0151rizt\u00e9k, a PAC nem sz\u00e1m\u00edtott), ami lehet\u0151v\u00e9 tette a helyi rendszerben fi\u00f3k l\u00e9trehoz\u00e1s\u00e1ra jogosults\u00e1ggal rendelkez\u0151 felhaszn\u00e1l\u00f3 sz\u00e1m\u00e1ra, hogy m\u00e1sik felhaszn\u00e1l\u00f3nak, k\u00f6zt\u00fck privilegiz\u00e1lt felhaszn\u00e1l\u00f3nak adja ki mag\u00e1t a tartom\u00e1nyban.\n<li class=\"l\"> CVE-2020-25721 \u2014 Az Active Directory sz\u00e1m\u00e1ra (objectSid) a Kerberos hiteles\u00edt\u00e9st haszn\u00e1l\u00f3 felhaszn\u00e1l\u00f3knak nem mindig egyedi azonos\u00edt\u00f3kat adtak, ami felhaszn\u00e1l\u00f3k \u00e1tfed\u00e9s\u00e9hez vezethetett.\n<li class=\"l\"> CVE-2021-23192 \u2014 MITM-t\u00e1mad\u00e1s sor\u00e1n lehet\u0151s\u00e9g volt DCE\/RPC nagy k\u00e9r\u00e9sdarabok fragmentumainak hamis\u00edt\u00e1s\u00e1ra, amelyek t\u00f6bb r\u00e9szre voltak bontva.  <\/ul>\n<p>Forr\u00e1s: <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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