{"id":69916,"date":"2020-03-26T13:17:37","date_gmt":"2020-03-26T12:17:37","guid":{"rendered":"https:\/\/mwtsolutions.eu\/?p=69916"},"modified":"2024-10-18T08:48:36","modified_gmt":"2024-10-18T06:48:36","slug":"microsoft-hibak-kb4551762-patch-altali-rendbetetele-smbv3-eternal-darkness-flaw-cve-2020-0796","status":"publish","type":"post","link":"https:\/\/i.mwtsolutions.eu\/hu\/cikk\/microsoft-hibak-kb4551762-patch-altali-rendbetetele-smbv3-eternal-darkness-flaw-cve-2020-0796\/","title":{"rendered":"Microsoft hib\u00e1k KB4551762 patch \u00e1ltali rendbet\u00e9tele SMBv3 Eternal Darkness flaw (CVE-2020-0796)"},"content":{"rendered":"<p>Microsoft a 2020-as M\u00e1rciusi Patch Kedd esem\u00e9nyen kiadott egy s\u00fcrg\u0151s friss\u00edt\u00e9st\u00a0<a href=\"https:\/\/support.microsoft.com\/en-in\/help\/4551762\/windows-10-update-kb4551762\">KB4551762<\/a>\u00a0, amely patch a s\u00e9r\u00fcl\u00e9keny SMBv3 (CVE-2020-0796) r\u00e9szhez tartozik.<\/p>\n<p>&nbsp;<\/p>\n<p>M\u00e1rcius 10.<\/p>\n<p>&nbsp;<\/p>\n<p>Patch kedd friss\u00edt\u00e9sek kapcs\u00e1n a\u00a0<a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/adv200005\">Biztons\u00e1gi tan\u00e1cs ADV200005<\/a>\u00a0nyilatkozta, hogy a szerver \u00fczenetk\u00fcld\u0151 blokkj\u00e1ban 3.1.1 (SMBv3) egy t\u00e1voli k\u00f3d futtat\u00e1skor s\u00e9r\u00fcl\u00e9kenys\u00e9get \u00e9szleltek, ahogy kezeli a t\u00f6m\u00f6r\u00edt\u00e9si folyamatban a kapcsolatok kezel\u00e9s\u00e9t. Ez a m\u00e1rciusi \u201ePatch kedd\u201d lesz a valaha legnagyobb ilyen esem\u00e9ny, amely ezzel a 115 CVE-s megold\u00e1ssal rengeteg figyelmet v\u00e1ltott ki a biztons\u00e1gi t\u00e9m\u00e1kban \u00e9rintettek k\u00f6z\u00f6tt.<\/p>\n<p>&nbsp;<\/p>\n<p>Az\u00a0<a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/adv200005\">ADV200005<\/a>\u00a0k\u00f6zlem\u00e9nyben szerepel:<\/p>\n<p>&nbsp;<\/p>\n<p>T\u00e1voli k\u00f3dfuttat\u00e1ssal kapcsolatos biztons\u00e1gi r\u00e9s van abban, ahogy a Microsoft Server Message Block 3.1.1 (SMBv3) protokoll kezel bizonyos k\u00e9r\u00e9seket. A biztons\u00e1gi r\u00e9st sikeresen kihaszn\u00e1l\u00f3 t\u00e1mad\u00f3 megszerezheti a k\u00f3d futtat\u00e1s\u00e1nak lehet\u0151s\u00e9g\u00e9t a c\u00e9lkiszolg\u00e1l\u00f3n vagy a felhaszn\u00e1l\u00f3n\u00e1l. A biztons\u00e1gi r\u00e9s kiszolg\u00e1l\u00f3val t\u00f6rt\u00e9n\u0151 kiakn\u00e1z\u00e1sa \u00e9rdek\u00e9ben egy nem hiteles\u00edtett t\u00e1mad\u00f3 egy speci\u00e1lisan kialak\u00edtott csomagot k\u00fcldhet egy megc\u00e9lzott SMBv3 kiszolg\u00e1l\u00f3nak. A biztons\u00e1gi r\u00e9s klienssel t\u00f6rt\u00e9n\u0151 kihaszn\u00e1l\u00e1s\u00e1hoz egy nem hiteles\u00edtett t\u00e1mad\u00f3nak konfigur\u00e1lnia kell egy rosszindulat\u00fa SMBv3 szervert, \u00e9s meg kell gy\u0151znie a felhaszn\u00e1l\u00f3t, hogy csatlakozzon hozz\u00e1.<\/p>\n<p>&nbsp;<\/p>\n<p>A biztons\u00e1gi friss\u00edt\u00e9s kijav\u00edtja a biztons\u00e1gi r\u00e9st az\u00e1ltal, hogy kijav\u00edtja az SMBv3 protokoll k\u00e9r\u00e9seinek kezel\u00e9s\u00e9t.<\/p>\n<p>A CVE-2020-0796 jellege miatt az EternalBlue-re, az SMBv1 t\u00e1voli k\u00f3dv\u00e9grehajt\u00e1si (RCE) sebezhet\u0151s\u00e9g\u00e9re eml\u00e9keztet. Ez az hasonl\u00f3s\u00e1g annyira f\u00e9lelmet kelt, hogy indokolt lehet ism\u00e9t a felk\u00e9sz\u00fcl\u00e9s a WannaCry \u00e9s a NotPetya \u00faj hull\u00e1maira.<\/p>\n<p>&nbsp;<\/p>\n<p>Egy nappal a patch kiad\u00e1sa el\u0151tt, Kryptos Logic Cybersecurity c\u00e9g a Twitteren megosztotta a bizony\u00edt\u00e1si elj\u00e1r\u00e1sul alapjait (PoC), valamint dem\u00f3zta a CVE-2020-0796-t. Kryptos Logic hozz\u00e1tette hogy azonos\u00edtott k\u00f6zel 48.000 s\u00e9r\u00fcl\u00e9keny hostot a teljes interneten, amely SMB portokon \u00e9rintett, \u00e9s \u00e9rheti \u0151ket egy EthernalDarkness t\u00e1mad\u00e1s. Mivel a bizony\u00edt\u00e1s nyilv\u00e1noss\u00e1 v\u00e1lt, itt az ideje, hogy a KB4551762 f\u00e1jlt a kiszolg\u00e1ltatott rendszerekre implement\u00e1lj\u00e1k.<\/p>\n<p>&nbsp;<\/p>\n<p>Amennyiben neh\u00e9zs\u00e9gekbe \u00fctk\u00f6zne a KB4551762 patch alkalmaz\u00e1sa, a Microsoft az SMB-kiszolg\u00e1l\u00f3kra vonatkoz\u00f3\u00a0<a href=\"https:\/\/portal.msrc.microsoft.com\/en-US\/security-guidance\/advisory\/adv200005\">biztons\u00e1gi aj\u00e1nl\u00e1sokban<\/a>\u00a0egy\u00e9b int\u00e9zked\u00e9seket javasol.<\/p>\n<p>&nbsp;<\/p>\n<p>Az EternalDarkness \u00e9s m\u00e1s kritikus t\u00e1mad\u00e1sok persze k\u00f6nnyen kezelhet\u0151ek a\u00a0<a href=\"https:\/\/www.manageengine.com\/vulnerability-management\/\">Vulnerability Manager Plus<\/a>\u00a0megold\u00e1ssal. A Vulnerability Manager Plusnak k\u00f6sz\u00f6nhet\u0151en ezek \u201c<em>azonnali s\u00e9r\u00fcl\u00e9kenys\u00e9gi<\/em>\u201d kateg\u00f3riak\u00e9nt megadj\u00e1k a t\u00e1mad\u00e1sokat, a nulla napos (azonnali) biztons\u00e1gi r\u00e9sek, valamint a nyilv\u00e1nosan k\u00f6zz\u00e9tett \u00e9s egy\u00e9b, k\u00f6nnyen kihaszn\u00e1lhat\u00f3 kritikus biztons\u00e1gi r\u00e9sek felett. Ebb\u0151l a modulb\u00f3l k\u00f6nnyen kijav\u00edthatjuk a CVE-2020-0796 szoftvert, mivel a jav\u00edt\u00e1sok automatikusan korrel\u00e1lnak kor\u00e1bban alkalmazottakhoz. Tov\u00e1bb\u00e1 lehet\u0151s\u00e9get ad a tesztel\u00e9sre \u201e<em>pilot<\/em>\u201d csoportokban is miel\u0151tt azt \u00e9lesben telep\u00edten\u00e9nk.\u00a0 Rendk\u00edv\u00fcl fontos, hogy v\u00e9gezz\u00fcnk tesztel\u00e9seket a jav\u00edt\u00e1s v\u00e9gleges alkalmaz\u00e1sa el\u0151tt, k\u00fcl\u00f6n\u00f6sen az\u00e9rt, mert\u00a0<em>out-of-band<\/em>\u00a0friss\u00edt\u00e9sek \u00f6sszef\u00fcggenek a m\u00faltban felmer\u00fcl\u0151 esem\u00e9nyekkel. A Vulnerability Manager Plus robusztus biztons\u00e1gi konfigur\u00e1ci\u00f3s funkci\u00f3ival ak\u00e1r blokkolhatja a 445-\u00f6s TCP-portot is az \u00e9rintett v\u00e9gpontokon, mivel ez a legjobb v\u00e9delem az SMB-vel kapcsolatos, \u00e1tj\u00e1rhat\u00f3 t\u00e1mad\u00e1sok ellen.<\/p>\n<p>&nbsp;<\/p>\n<p>Nem kell v\u00e1rakozni,\u00a0<a href=\"https:\/\/www.manageengine.com\/vulnerability-management\/download.html\">30-napos Vulnerability Manager Plus<\/a>\u00a0pr\u00f3baverzi\u00f3t azonnal telep\u00edthetj\u00fck, amely biztosan megv\u00e9di az teljes els\u00f6t\u00e9ted\u00e9st\u0151l, \u201eEternalDarkness\u201d-t\u0151l.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft a 2020-as M\u00e1rciusi Patch Kedd esem\u00e9nyen kiadott egy s\u00fcrg\u0151s friss\u00edt\u00e9st\u00a0KB4551762\u00a0, amely patch a s\u00e9r\u00fcl\u00e9keny SMBv3 (CVE-2020-0796) r\u00e9szhez tartozik. &nbsp; M\u00e1rcius 10. &nbsp; Patch kedd friss\u00edt\u00e9sek kapcs\u00e1n a\u00a0Biztons\u00e1gi tan\u00e1cs ADV200005\u00a0nyilatkozta, hogy a szerver \u00fczenetk\u00fcld\u0151 blokkj\u00e1ban 3.1.1 (SMBv3) egy t\u00e1voli k\u00f3d futtat\u00e1skor s\u00e9r\u00fcl\u00e9kenys\u00e9get \u00e9szleltek, ahogy kezeli a t\u00f6m\u00f6r\u00edt\u00e9si folyamatban a kapcsolatok kezel\u00e9s\u00e9t. Ez a m\u00e1rciusi \u201ePatch [&hellip;]<\/p>\n","protected":false},"author":20,"featured_media":69974,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","om_disable_all_campaigns":false,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_links_to":"","_links_to_target":""},"categories":[275],"tags":[],"acf":[],"aioseo_notices":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Microsoft hib\u00e1k KB4551762 patch \u00e1ltali rendbet\u00e9tele SMBv3 Eternal Darkness flaw (CVE-2020-0796) - MWT Solutions<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/i.mwtsolutions.eu\/hu\/cikk\/microsoft-hibak-kb4551762-patch-altali-rendbetetele-smbv3-eternal-darkness-flaw-cve-2020-0796\/\" \/>\n<meta property=\"og:locale\" content=\"hu_HU\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Microsoft hib\u00e1k KB4551762 patch \u00e1ltali rendbet\u00e9tele SMBv3 Eternal Darkness flaw (CVE-2020-0796) - MWT Solutions\" \/>\n<meta property=\"og:description\" content=\"Microsoft a 2020-as M\u00e1rciusi Patch Kedd esem\u00e9nyen kiadott egy s\u00fcrg\u0151s friss\u00edt\u00e9st\u00a0KB4551762\u00a0, amely patch a s\u00e9r\u00fcl\u00e9keny SMBv3 (CVE-2020-0796) r\u00e9szhez tartozik. &nbsp; M\u00e1rcius 10. &nbsp; Patch kedd friss\u00edt\u00e9sek kapcs\u00e1n a\u00a0Biztons\u00e1gi tan\u00e1cs ADV200005\u00a0nyilatkozta, hogy a szerver \u00fczenetk\u00fcld\u0151 blokkj\u00e1ban 3.1.1 (SMBv3) egy t\u00e1voli k\u00f3d futtat\u00e1skor s\u00e9r\u00fcl\u00e9kenys\u00e9get \u00e9szleltek, ahogy kezeli a t\u00f6m\u00f6r\u00edt\u00e9si folyamatban a kapcsolatok kezel\u00e9s\u00e9t. 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