{"id":87197,"date":"2020-07-05T07:42:02","date_gmt":"2020-07-05T05:42:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-ssh-klientah-openssh-i-putty"},"modified":"2020-07-05T07:42:02","modified_gmt":"2020-07-05T05:42:02","slug":"uyazvimost-v-ssh-klientah-openssh-i-putty","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/uyazvimost-v-ssh-klientah-openssh-i-putty","title":{"rendered":"Vulnerabilitet n\u00eb klient\u00ebt SSH OpenSSH dhe PuTTY","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

N\u00eb klient\u00ebt SSH OpenSSH dhe PuTTY u identifikua<\/a><\/noindex> vulnerabiliteti<\/a><\/noindex> (CVE-2020-14002<\/a><\/noindex> n\u00eb PuTTY dhe CVE-2020-14145<\/a><\/noindex> n\u00eb OpenSSH), q\u00eb \u00e7on n\u00eb rrjedhjen e t\u00eb dh\u00ebnave n\u00eb algoritmin e negociat\u00ebs s\u00eb lidhjes. Kjo vulnerabilitet lejon nj\u00eb sulmues, i cili \u00ebsht\u00eb n\u00eb gjendje t\u00eb kap\u00eb trafikun e klientit (p.sh., kur nj\u00eb p\u00ebrdorues lidhet p\u00ebrmes nj\u00eb pike t\u00eb kontrolluar nga sulmuesi), t\u00eb identifikoj\u00eb p\u00ebrpjekjen e lidhjes fillestare t\u00eb klientit me host-in, kur \u00e7el\u00ebsi i host-it ende nuk \u00ebsht\u00eb ruajtur n\u00eb cache nga klienti. <\/p>\n

Duke e ditur se klienti po p\u00ebrpiqet t\u00eb lidhet p\u00ebr her\u00eb t\u00eb par\u00eb dhe ende nuk ka \u00e7el\u00ebsin e hostit n\u00eb an\u00ebn e tij, nj\u00eb sulmues mund t\u00eb transmetoj\u00eb lidhjen n\u00ebp\u00ebr vet\u00eb (MITM) dhe t'i jap\u00eb klientit \u00e7el\u00ebsin e tij t\u00eb hostit, t\u00eb cilin klienti SSH do ta marr\u00eb si \u00e7el\u00ebsin e hostit t\u00eb synuar, n\u00ebse nuk verifikon fingerprint-in e \u00e7el\u00ebsit. K\u00ebshtu, sulmuesi mund t\u00eb organizoj\u00eb nj\u00eb MITM pa e ngritur dyshimin e p\u00ebrdoruesit dhe t\u00eb injoroj\u00eb seancat, n\u00eb t\u00eb cilat n\u00eb an\u00ebn e klientit tashm\u00eb ka \u00e7el\u00ebsa hostesh t\u00eb ruajtur, p\u00ebrpjekja p\u00ebr t\u00eb ndryshuar t\u00eb cilat do t\u00eb shkaktoj\u00eb nj\u00eb paralajm\u00ebrim p\u00ebr ndryshimin e \u00e7el\u00ebsit t\u00eb hostit. Sulmi bazohet n\u00eb pakujdesin\u00eb e p\u00ebrdoruesve, t\u00eb cil\u00ebt nuk realizojn\u00eb nj\u00eb kontrolle manuale t\u00eb fingerprint-it t\u00eb \u00e7el\u00ebsit t\u00eb hostit gjat\u00eb lidhjes s\u00eb par\u00eb. Ata q\u00eb kontrollojn\u00eb fingerprint-et e \u00e7el\u00ebsave jan\u00eb t\u00eb mbrojtur nga sulme t\u00eb till\u00eb.<\/p>\n

Si nj\u00eb tregues p\u00ebr t\u00eb p\u00ebrcaktuar p\u00ebrpjekjen e par\u00eb p\u00ebr lidhje, p\u00ebrdoret ndryshimi i rendit t\u00eb list\u00ebs s\u00eb algoritmeve t\u00eb \u00e7el\u00ebsave t\u00eb hostit t\u00eb mb\u00ebshtetur. N\u00ebse ndodh lidhja e par\u00eb, klienti d\u00ebrgon nj\u00eb list\u00eb algoritmesh sipas parazgjedhjes, dhe n\u00ebse \u00e7el\u00ebsi i hostit \u00ebsht\u00eb tashm\u00eb n\u00eb cache, algoritmi i lidhur me t\u00eb vendoset n\u00eb vendin e par\u00eb (algoritmet renditen sipas preferenc\u00ebs). <\/p>\n

Problemi shfaqet n\u00eb versionet e OpenSSH nga 5.7 deri n\u00eb 8.3 dhe n\u00eb PuTTY nga 0.68 deri n\u00eb 0.73. Problemi i eliminuar<\/a><\/noindex> n\u00eb publikimin PuTTY 0.74<\/a><\/noindex> n\u00ebp\u00ebrmjet shtimit t\u00eb nj\u00eb opsioni p\u00ebr t\u00eb \u00e7aktivizuar nd\u00ebrtimin dinamik t\u00eb list\u00ebs s\u00eb algoritmeve p\u00ebr p\u00ebrpunimin e \u00e7el\u00ebsave t\u00eb hostit n\u00eb favor t\u00eb renditjes s\u00eb algoritmeve n\u00eb nj\u00eb rend t\u00eb vazhduesh\u00ebm.<\/p>\n

Projekti OpenSSH nuk ka n\u00eb plan t\u00eb ndryshoj\u00eb sjelljen e klientit SSH, pasi n\u00ebse nuk specifikohet algoritmi i \u00e7el\u00ebsit t\u00eb pranish\u00ebm n\u00eb vend t\u00eb par\u00eb, do t\u00eb p\u00ebrpiqet t\u00eb aplikohet nj\u00eb algorit\u00ebm i pap\u00ebrshtatsh\u00ebm p\u00ebr \u00e7el\u00ebsin e ruajtur me nj\u00eb paralajm\u00ebrim p\u00ebr nj\u00eb \u00e7el\u00ebs t\u00eb panjohur. Pra, krijohet nj\u00eb zgjedhje \u2014 ose rrjedhje informacioni (OpenSSH dhe PuTTY), ose shfaqje paralajm\u00ebrimesh p\u00ebr ndryshimin e \u00e7el\u00ebsit (Dropbear SSH) n\u00eb rast se \u00e7el\u00ebsi i ruajtur nuk p\u00ebrputhet me algoritmin e par\u00eb n\u00eb list\u00ebn e parazgjedhur.<\/p>\n

P\u00ebr sigurimin e mbrojtjes n\u00eb OpenSSH, \u00ebsht\u00eb e rekomanduar t\u00eb p\u00ebrdoren m\u00ebnyra alternative p\u00ebr verifikimin e \u00e7el\u00ebsit t\u00eb hostit p\u00ebrmes sh\u00ebnimeve SSHFP n\u00eb DNSSEC dhe certifikata t\u00eb hostit (PKI). Gjithashtu, mund t\u00eb \u00e7aktivizohet zgjedhja adaptuese e algoritmeve t\u00eb \u00e7el\u00ebsave t\u00eb hostit p\u00ebrmes opsionit HostKeyAlgorithms dhe t\u00eb p\u00ebrdoret opsioni UpdateHostKeys p\u00ebr t\u00eb marr\u00eb \u00e7el\u00ebsa t\u00eb tjer\u00eb hosti nga klienti pas autentikimit.<\/p>\n

<\/a><\/noindex><\/p>\n

Burimi: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 SSH-\u043a\u043b\u0438\u0435\u043d\u0442\u0430\u0445 OpenSSH \u0438 PuTTY \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-14002 \u0432 PuTTY \u0438 CVE-2020-14145 \u0432 OpenSSH), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0443\u0442\u0435\u0447\u043a\u0435 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u0439 \u0432 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0435 \u0441\u043e\u0433\u043b\u0430\u0441\u043e\u0432\u0430\u043d\u0438\u044f \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443, \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u043c\u0443 \u043f\u0435\u0440\u0435\u0445\u0432\u0430\u0442\u0438\u0442\u044c \u0442\u0440\u0430\u0444\u0438\u043a \u043a\u043b\u0438\u0435\u043d\u0442\u0430 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u0440\u0438 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f \u0447\u0435\u0440\u0435\u0437 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u0443\u044e \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u043c \u0442\u043e\u0447\u043a\u0443 \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430), \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u044c \u043f\u043e\u043f\u044b\u0442\u043a\u0443 \u043f\u0435\u0440\u0432\u043e\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u043a \u0445\u043e\u0441\u0442\u0443, \u043a\u043e\u0433\u0434\u0430 \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u043c \u0435\u0449\u0451 \u043d\u0435 \u043f\u0440\u043e\u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d \u043a\u043b\u044e\u0447 \u0445\u043e\u0441\u0442\u0430. \u0417\u043d\u0430\u044f, \u0447\u0442\u043e […]<\/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-87197","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Dob\u00ebsia n\u00eb klient\u00ebt SSH OpenSSH dhe PuTTY | ProHoster","description":"N\u00eb klient\u00ebt SSH OpenSSH dhe PuTTY \u00ebsht\u00eb zbuluar nj\u00eb dob\u00ebsi (CVE-2020-14002 n\u00eb PuTTY dhe CVE-2020-14145 n\u00eb OpenSSH), e cila \u00e7on n\u00eb rrjedhjen e informacionit n\u00eb algoritmin e pajtimit t\u00eb lidhjes. Dob\u00ebsia i mund\u00ebson nj\u00eb sulmuesi, q\u00eb mund t\u00eb kap\u00eb trafikun e klientit (p.sh., gjat\u00eb lidhjes s\u00eb nj\u00eb p\u00ebrdoruesi p\u00ebrmes nj\u00eb pike wireless t\u00eb kontrolluar nga sulmuesi), t\u00eb p\u00ebrcaktoj\u00eb p\u00ebrpjekjen e lidhjes fillestare t\u00eb klientit me hostin, kur \u00e7el\u00ebsi i hostit nuk \u00ebsht\u00eb ende i ruajtur nga klienti. Duke e ditur k\u00ebt\u00eb,","canonical_url":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/uyazvimost-v-ssh-klientah-openssh-i-putty","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sq_AL","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 SSH-\u043a\u043b\u0438\u0435\u043d\u0442\u0430\u0445 OpenSSH \u0438 PuTTY | ProHoster","og:description":"\u0412 SSH-\u043a\u043b\u0438\u0435\u043d\u0442\u0430\u0445 OpenSSH \u0438 PuTTY \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-14002 \u0432 PuTTY \u0438 CVE-2020-14145 \u0432 OpenSSH), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0443\u0442\u0435\u0447\u043a\u0435 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u0439 \u0432 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0435 \u0441\u043e\u0433\u043b\u0430\u0441\u043e\u0432\u0430\u043d\u0438\u044f \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443, \u0441\u043f\u043e\u0441\u043e\u0431\u043d\u043e\u043c\u0443 \u043f\u0435\u0440\u0435\u0445\u0432\u0430\u0442\u0438\u0442\u044c \u0442\u0440\u0430\u0444\u0438\u043a \u043a\u043b\u0438\u0435\u043d\u0442\u0430 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u0440\u0438 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