{"id":40585,"date":"2020-02-02T10:38:22","date_gmt":"2020-02-02T07:38:22","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/uyazvimosti-setej-5g"},"modified":"2020-02-02T10:38:22","modified_gmt":"2020-02-02T07:38:22","slug":"uyazvimosti-setej-5g","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/uyazvimosti-setej-5g","title":{"rendered":"5G-v\u00f5rkude haavatavused","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"5G-v\u00f5rkude haavatavused\" src=\"\/wp-content\/uploads\/2020\/02\/656548e68c974d920250349994b24721.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<i>Kui entusiastid ootavad p\u00f5nevusega viienda p\u00f5lvkonna v\u00f5rkude laialdast rakendamist, h\u00f5\u00f5ruvad k\u00fcberkurjategijad k\u00e4si, oodates uusi v\u00f5imalusi kasumi teenimiseks. Hoolimata arendajate pingutustest sisaldab 5G tehnoloogia haavatavusi, mille tuvastamine on keeruline uute tingimuste t\u00f5ttu. Uurime v\u00e4ikest 5G v\u00f5rku ja toome v\u00e4lja kolm t\u00fc\u00fcpi haavatavusi, millest r\u00e4\u00e4gime selles postituses. <\/i><br \/>\n <noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>Uurimise objekt<\/h3>\n<p>\nVaatame lihtsat n\u00e4idet \u2014 mudel p\u00f5hineb mitteavalikul 5G v\u00f5rgul \u00fclikooli linnakus (Non-Public Network, NPN), millel on \u00fchendus v\u00e4lismaailmaga l\u00e4bi \u00fcldkasutatavate sidekanalite. Just selliseid v\u00f5rke hakatakse peagi kasutama t\u00fc\u00fcpiliste lahendustena k\u00f5igis riikides, kes on liitunud 5G v\u00f5idujooksuga. Potentsiaalne keskkond selliste v\u00f5rgu konfiguratsioonide juurutamiseks on 'targad' ettev\u00f5tted, 'targad' linnad, suurte ettev\u00f5tete b\u00fcrood ja teised sarnased asukohad, kus kontrollitavus on k\u00f5rge. <\/p>\n<p><img decoding=\"async\" alt=\"5G-v\u00f5rkude haavatavused\" src=\"\/wp-content\/uploads\/2020\/02\/266e447d122674db9fc694ff86b4bcdd.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n <i>NPN infrastruktuur: ettev\u00f5tte suletud v\u00f5rk on \u00fchendatud globaalsete 5G v\u00f5rkudega l\u00e4bi avalike kanalite. Allikas: Trend Micro<\/i><\/p>\n<p>Erinevalt neljanda p\u00f5lvkonna v\u00f5rkudest on 5G v\u00f5rgud suunatud reaalajas andmete t\u00f6\u00f6tlemisele, seega on nende arhitektuur kihiline. Tasemete jagamine lihtsustab suhtlemist API standardimise kaudu kihtide vahel.<\/p>\n<p><img decoding=\"async\" alt=\"5G-v\u00f5rkude haavatavused\" src=\"\/wp-content\/uploads\/2020\/02\/4a6c70ab37b8a15ef32c14bba947bd65.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>4G ja 5G arhitektuuride v\u00f5rdlus. Allikas: Trend Micro<\/i><\/p>\n<p>Tulemuseks on suurenenud automatiseerimis- ja skaleeritavuse v\u00f5imalused, mis on kriitilise t\u00e4htsusega IoT (internet of things) tohutute teabevoogude t\u00f6\u00f6tlemisel.<br \/>\n5G standardis sisalduv kihtide isolatsioon toob kaasa uue probleemi: NPN-s t\u00f6\u00f6tavad turvas\u00fcsteemid kaitsevad objekti ja selle privaatset pilve, samas kui v\u00e4liste v\u00f5rkude turvas\u00fcsteemid kaitsevad oma sisemist infrastruktuuri. Kuid NPN ja v\u00e4liste v\u00f5rkude vaheline liiklus loetakse turvaliseks, kuna see tuleneb kaitstud s\u00fcsteemidest, kuid tegelikult ei kaitse seda keegi. <\/p>\n<p>Meie v\u00e4rskes uuringus <noindex><a rel=\"nofollow\" href=\"https:\/\/documents.trendmicro.com\/assets\/white_papers\/wp-securing-5g-through-cyber-telecom-identity-federation.pdf\">Securing 5G Through Cyber-Telecom Identity Federation<\/a><\/noindex> toome esile mitmeid k\u00fcberr\u00fcnnakute stsenaariume 5G v\u00f5rkudele, mis kasutavad \u00e4ra:<\/p>\n<ul>\n<li>SIM-kaartide haavatavusi,<\/li>\n<li>v\u00f5rgu haavatavusi,<\/li>\n<li>identiteedi autentimise haavatavusi.<\/li>\n<\/ul>\n<p>\nVaatame iga haavatavust l\u00e4hemalt. <\/p>\n<h3>SIM-kaartide haavatavused<\/h3>\n<p>\nSIM-kaart on keeruline seade, millel on isegi terve komplekt sissebuilt rakendusi \u2014 SIM Toolkit, STK. \u00dcks neist programmidest, S@T Browser, v\u00f5iks teoreetiliselt kasutada operaatori sisemistele saitidele ligip\u00e4\u00e4semiseks, kuid praktikas on see ammu unustatud ja viimati uuendatud 2009. aastal, kuna n\u00fc\u00fcd t\u00e4idavad neid funktsioone teised programmid. <\/p>\n<p>Probleem on selles, et S@T Browser on haavatav: spetsiaalselt ette valmistatud teenindus-SMS h\u00e4kkib SIM-kaardi ja sundib seda t\u00e4itma h\u00e4kkerile vajalikud k\u00e4sud, samas kui telefoni v\u00f5i seadme kasutaja ei pane midagi kahtlast t\u00e4hele. R\u00fcnnakut nimetatakse <noindex><a rel=\"nofollow\" href=\"https:\/\/simjacker.com\/downloads\/technicalpapers\/AdaptiveMobile_Security_Simjacker_Technical_Paper_v1.01.pdf\">Simjaker<\/a><\/noindex> ja see annab kurjategijatele palju v\u00f5imalusi. <\/p>\n<p><img decoding=\"async\" alt=\"5G-v\u00f5rkude haavatavused\" src=\"\/wp-content\/uploads\/2020\/02\/d23b7f7a77838d76a881a40d721eabb7.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Simjacking r\u00fcnnak 5G-v\u00f5rgus. Allikas: Trend Micro<\/i><\/p>\n<p>Eelk\u00f5ige v\u00f5imaldab see edastada kurjategijale tellija asukohaandmed, seadme identifikaatori (IMEI) ja mobiiltelefonide mastide (Cell ID) identifikaatori, samuti sundida telefoni valima numbrit, saatma SMS-e, avama linki brauseris ja isegi v\u00e4ljastama SIM-kaart. <\/p>\n<p>5G-v\u00f5rkudes muutub see SIM-kaartide haavatavus t\u00f5siseks probleemiks, arvestades \u00fchendatud seadmete arvu. Kuigi <noindex><a rel=\"nofollow\" href=\"https:\/\/venturebeat.com\/2018\/12\/14\/simalliance-a-new-5g-sim-card-is-necessary-to-beef-up-network-security\/\">SIMAlliance on v\u00e4lja t\u00f6\u00f6tanud uued 5G SIM-kaartide standardid, mis pakuvad paremat turvalisust<\/a><\/noindex>, on siiski <noindex><a rel=\"nofollow\" href=\"https:\/\/www.ericsson.com\/en\/blog\/2020\/1\/5g-security-sim-card\">v\u00f5imalik kasutada \"vanu\" SIM-kaarte<\/a><\/noindex>. Ja kuna k\u00f5ik t\u00f6\u00f6tab ikka veel, ei tasu oodata, et olemasolevad SIM-kaardid vahetatakse kiiresti. <\/p>\n<p><img decoding=\"async\" alt=\"5G-v\u00f5rkude haavatavused\" src=\"\/wp-content\/uploads\/2020\/02\/208833a443e53b03c07f415476144a4b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Kahjuliku r\u00e4ndluse kasutamine. Allikas: Trend Micro<\/i><\/p>\n<p>Simjacking kasutamine v\u00f5imaldab sundida SIM-kaarti r\u00e4ndere\u017eiimile ja \u00fchendada see mobiilile, mille \u00fcle kurjategija kontrollib. Sel juhul saab r\u00fcndaja muuta SIM-kaardi seadistusi, et kuulata telefonik\u00f5nesid, sisestada pahavara ja l\u00e4bi viia erinevaid r\u00fcnnakuid seadmega, millel on h\u00e4kitud SIM-kaart. Seda v\u00f5imaldab asjaolu, et r\u00e4ndlustooted suheldes m\u00f6\u00f6duvad tavap\u00e4rastest turvamenetlustest, mis kehtivad \"koduv\u00f5rgus\" olevatele seadmetele. <\/p>\n<h3>V\u00f5rgu haavatavused <\/h3>\n<p>\nK\u00fcberturud saavad muuta komprimeeritud SIM-kaardi seadeid oma eesm\u00e4rkide saavutamiseks. Simjaking r\u00fcnnaku suhteline kergus ja varjatus v\u00f5imaldavad seda pidevalt l\u00e4bi viia, haarates \u00fcha uusi seadmeid aeglaselt ja kannatlikult (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.cloudflare.com\/learning\/ddos\/ddos-low-and-slow-attack\/\">low and slow attack<\/a><\/noindex>) l\u00f5igates v\u00f5rku t\u00fckikeste kaupa nagu salami (<noindex><a rel=\"nofollow\" href=\"https:\/\/ajmaurya.wordpress.com\/2014\/03\/27\/what-is-a-salami-attack\/\">salami attack<\/a><\/noindex>). Sellise r\u00fcnnaku j\u00e4lgimine on \u00e4\u00e4rmiselt keeruline ja 5G keerulises jaotatud v\u00f5rgus \u2014 praktiliselt v\u00f5imatu. <\/p>\n<p><img decoding=\"async\" alt=\"5G-v\u00f5rkude haavatavused\" src=\"\/wp-content\/uploads\/2020\/02\/36e5f0da189c645567d97eeefa3643de.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Aeglane sissetoomine 5G v\u00f5rku, kasutades Low and Slow + Salami r\u00fcnnakuid. Allikas: Trend Micro<\/i><\/p>\n<p>Kuna 5G v\u00f5rgud ei oma sisseehitatud SIM-kaardi turvakontrolli mehhanisme, saavad kurjategijad j\u00e4rk-j\u00e4rgult seada oma reeglid 5G kommunikatsiooni domeenis, kasutades haaratud SIM-kaarte vahendite varastamiseks, v\u00f5rgu tasemel autoriseerimiseks, pahatahtliku tarkvara installimiseks ja muuks ebaseaduslikuks tegevuseks. <\/p>\n<p>Erilist muret tekitab Simjakingu kaudu SIM-kaartide haaramise automatiseerimiseks m\u00f5eldud t\u00f6\u00f6riistade ilmumine h\u00e4kkerifoorumitesse, kuna selliste vahendite kasutamine viienda p\u00f5lvkonna v\u00f5rkudes annab kurjategijatele peaaegu piiramatu v\u00f5imaluse r\u00fcnnakute skaleerimiseks ja usaldusv\u00e4\u00e4rse liikluse modifitseerimiseks. <\/p>\n<p><b><\/p>\n<h3>Identifitseerimise haavatavused<\/h3>\n<p><\/b><br \/>\nSIM-kaarti kasutatakse seadme identifitseerimiseks v\u00f5rgus. Kui SIM-kaart on aktiivne ja sellel on positiivne saldo, loetakse seade automaatselt legitiimseks ja ei kahtlustata s\u00fcsteemide tasemel. Samas, SIM-kaardi enda haavatavus muudab kogu identifitseerimiss\u00fcsteemi haavatavaks. Infotehnoloogia turvas\u00fcsteemid ei suuda j\u00e4lgida ebaseaduslikult \u00fchendatud seadet, kui see registreerib end v\u00f5rgus Simjakingu kaudu varastatud identiteediandmetega. <\/p>\n<p>Tulemuseks on see, et h\u00e4kker, kes on \u00fchendatud v\u00f5rku l\u00e4bi h\u00e4kitud SIM-kaardi, saab juurdep\u00e4\u00e4su t\u00f5elise omaniku tasemel, kuna infotehnoloogia s\u00fcsteemid ei kontrolli enam seadmeid, mis on l\u00e4binud v\u00f5rgu tasemel identifitseerimise. <\/p>\n<p>Garanteeritud identifitseerimine tarkvara ja v\u00f5rgu tasandil toob kaasa veel \u00fche probleemi: kurjategijad v\u00f5ivad tahtlikult genereerida \"m\u00fcra\" sissetungimise avastamise s\u00fcsteemidele, tehes pidevalt erinevaid kahtlaseid tegevusi kinni p\u00fc\u00fctud seadmete nimel. Kuna automaatsete avastamiss\u00fcsteemide t\u00f6\u00f6 p\u00f5hineb statistika anal\u00fc\u00fcsil, t\u00f5usevad aeglaselt h\u00e4irek\u00f5nede l\u00e4vendid, tagades reaalseid r\u00fcnnakuid mitte reageerimist. Pikaajaline selline m\u00f5ju on t\u00e4iesti v\u00f5imeline muutma kogu v\u00f5rgu toimimist ja looma statistilisi \"pimedate\" alasid avastamiss\u00fcsteemidele. Kurjategijad, kes kontrollivad neid alasid, saavad r\u00fcnnata andmeid v\u00f5rgu sees ja f\u00fc\u00fcsilisi seadmeid, korraldada teenuse osutamise katkestamist ja tekitada muud kahju. <\/p>\n<p><b><\/p>\n<h3>Lahendus: \u00fchtne identiteedi kontrollimine<\/h3>\n<p><\/b><br \/>\nUuringu all j\u00e4\u00e4ne NPN 5G v\u00f5rgu haavatavused on tingitud turvamenetluste killustatusest kommunikatsiooni, SIM-kaartide ja seadmete tasandil, samuti r\u00e4ndluse vahelise v\u00f5rgu interaktsiooni tasandil. Selle probleemi lahendamiseks on vajalik rakendada null usaldusv\u00e4\u00e4rsuse printsiipi (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.paloaltonetworks.com\/cyberpedia\/what-is-a-zero-trust-architecture\">Zero-Trust Architecture, ZTA<\/a><\/noindex>) tagades autentimise igal sammul v\u00f5rku \u00fchenduvate seadmete jaoks, rakendades f\u00f6deraalse identifitseerimise ja juurdep\u00e4\u00e4su haldamise mudelit (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.securityforum.org\/uploads\/2015\/03\/isf_fiam_es.pdf\">Federated Identity and Access Management, FIdAM<\/a><\/noindex>).<\/p>\n<p>ZTA printsiip seisneb turvalisuse s\u00e4ilitamises isegi siis, kui seade ei ole kontrollitud, liigub v\u00f5i on v\u00f5rgu piirist v\u00e4lja. F\u00f6deraalne identifitseerimise mudel on l\u00e4henemine 5G turvalisusele, mis tagab \u00fchtse koordineeritud arhitektuuri autentimiseks, juurdep\u00e4\u00e4su\u00f5iguste, andmete terviklikkuse ja muude komponentide ning tehnoloogiate jaoks 5G v\u00f5rkudes.<\/p>\n<p>Selline l\u00e4henemine v\u00e4listab v\u00f5imaluse, et v\u00f5rku v\u00f5iks sisestada \"r\u00e4ndluse\" torn ja suunata sellele kinni p\u00fc\u00fctud SIM-kaardid. IT-s\u00fcsteemid suudavad t\u00e4ielikult tuvastada v\u00f5\u00f5raste seadmete \u00fchenduse ja blokeerida parasiitset liiklust, mis genereerib statistilist m\u00fcra. <\/p>\n<p>SIM-kaardi kaitsmiseks modifitseerimise eest on vaja lisada t\u00e4iendavad terviklikkuse kontrollimise vahendid, mis v\u00f5ivad olla rakendatud SIM-rakenduse vormis, mis p\u00f5hineb plokiahelal. Rakendust saab kasutada seadmete ja kasutajate autentimiseks ning samuti SIM-kaardi tarkvara ja seadete terviklikkuse kontrollimiseks nii r\u00e4ndluses kui ka koduv\u00f5rgus. <br \/>\n<img decoding=\"async\" alt=\"5G-v\u00f5rkude haavatavused\" src=\"\/wp-content\/uploads\/2020\/02\/47b5019c69ea78b1db54e0971681b6f4.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n <br \/>\n<b><\/p>\n<h3>Kokkuv\u00f5tteks<\/h3>\n<p><\/b><br \/>\n Tuletatud 5G turvaprobleemide lahendused v\u00f5ib esitada kolme l\u00e4henemisena: <\/p>\n<ul>\n<li>f\u00f6deratiivse isikutuvastuse ja juurdep\u00e4\u00e4su halduse mudeli rakendamine, mis tagab andmete terviklikkuse v\u00f5rgus;<\/li>\n<li>ohtude t\u00e4ieliku n\u00e4htavuse tagamine, rakendades jaotatud registrit SIM-kaardide seaduslikkuse ja terviklikkuse kontrollimiseks;<\/li>\n<li>piirideta jaotatud turvas\u00fcsteemi moodustamine, mis lahendab seadmete r\u00e4ndlusprobleemid. <\/li>\n<\/ul>\n<p>\nNende meetmete praktiline rakendamine n\u00f5uab aega ja suuri investeeringuid, kuid 5G-v\u00f5rkude juurutamine toimub igal pool, seega tuleb haavatavuste k\u00f5rvaldamisega alustada kohe.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/trendmicro\/blog\/486262\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u043a\u0430 \u044d\u043d\u0442\u0443\u0437\u0438\u0430\u0441\u0442\u044b \u0441 \u0442\u0440\u0435\u043f\u0435\u0442\u043e\u043c \u0436\u0434\u0443\u0442 \u043c\u0430\u0441\u0441\u043e\u0432\u043e\u0433\u043e \u0432\u043d\u0435\u0434\u0440\u0435\u043d\u0438\u044f \u0441\u0435\u0442\u0435\u0439 \u043f\u044f\u0442\u043e\u0433\u043e \u043f\u043e\u043a\u043e\u043b\u0435\u043d\u0438\u044f, \u043a\u0438\u0431\u0435\u0440\u043f\u0440\u0435\u0441\u0442\u0443\u043f\u043d\u0438\u043a\u0438 \u043f\u043e\u0442\u0438\u0440\u0430\u044e\u0442 \u0440\u0443\u043a\u0438, \u043f\u0440\u0435\u0434\u0432\u043a\u0443\u0448\u0430\u044f \u043d\u043e\u0432\u044b\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 \u0434\u043b\u044f \u043d\u0430\u0436\u0438\u0432\u044b. \u041d\u0435\u0441\u043c\u043e\u0442\u0440\u044f \u043d\u0430 \u0432\u0441\u0435 \u0441\u0442\u0430\u0440\u0430\u043d\u0438\u044f \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u044f 5G \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u0442 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u0435 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043e\u0441\u043b\u043e\u0436\u043d\u044f\u0435\u0442\u0441\u044f \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435\u043c \u043e\u043f\u044b\u0442\u0430 \u0440\u0430\u0431\u043e\u0442\u044b \u0432 \u043d\u043e\u0432\u044b\u0445 \u0443\u0441\u043b\u043e\u0432\u0438\u044f\u0445. \u041c\u044b 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