{"id":164054,"date":"2026-03-13T11:12:02","date_gmt":"2026-03-13T09:12:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-gssapi-patche-k-openssh-udalyonno-ekspluatiruemaya-na-stadii-do-autentifikaczii"},"modified":"2026-03-13T11:12:02","modified_gmt":"2026-03-13T09:12:02","slug":"uyazvimost-v-gssapi-patche-k-openssh-udalyonno-ekspluatiruemaya-na-stadii-do-autentifikaczii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimost-v-gssapi-patche-k-openssh-udalyonno-ekspluatiruemaya-na-stadii-do-autentifikaczii","title":{"rendered":"Haavatavus GSSAPI-patchis OpenSSH-s, mida saab kaugelt \u00e4ra kasutada enne autentimist","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Paljudes Linuxi jaotustes kasutatav gssapi.patch, mis lisab OpenSSH-sse GSSAPI-p\u00f5hise v\u00f5tmevahetuse toe, sisaldab haavatavust (CVE-2026-3497), mis viib osutaja dereferentseerimise, m\u00e4lu kahjustamise ja privileegide eraldamise mehhanismi (Privsep) ring \u00fcmber. Haavatavust saab kaugtasandil \u00e4ra kasutada enne autentimise toimumist. Probleemi avastanud teadlane demonstreeris protsessi kokkuvarisemise algatamist, saates SSH-serverile \u00fche muudetud v\u00f5rgupaketti. Ei v\u00e4listata, et lisaks teenuse keelamisele on olemas ka ohtlikumaid haavatavuse \u00e4ra kasutamise variante. <\/p>\n

Tasub mainida, et alustuseks keeldusid OpenSSH arendajad GSSAPI toe toetamise p\u00f5hikoosseisu lisamisest, kuna kahtlesid selle ohutuses. Paljud Linuxi distributsioonid on siiski selle pat\u0161i juba oma OpenSSH pakettidesse lisanud. GSSAPI pat\u0161i leiab mitmeid versioone, kuid enamikus neist on olemas haavatavust tekitav viga. Praegu on parandamine saadaval ainult pat\u0161i kujul, mille muudatused seisnevad sshpkt_disconnect() funktsiooni kutsumise asendamises ssh_packet_disconnect() funktsiooniga failis kexgsss.c. <\/p>\n

Praegu on haavatavuse olemasolu kinnitatud Debianis ja Ubuntu's. Teistes distributsioonides (SUSE\/openSUSE, RHEL, Gentoo, Arch, Fedora) selgitatakse probleemse pat\u0161i rakendamist ja selle haavatavust. Haavatavus avaldub ainult siis, kui seadetes on aktiveeritud valik «GSSAPIKeyExchange yes». Ka paketi koostamiseks kasutatud kompilaatori valikud m\u00f5jutavad selle \u00e4rakasutamise v\u00f5imalust. <\/p>\n

Ohvawa tekib viga sshpkt_disconnect() funktsioonis, mille t\u00f5ttu protsess ei l\u00f5petanud p\u00e4rast disconnect-s\u00f5numi saabumist, mis v\u00f5imaldas r\u00fcndajal v\u00f5tmete lepingu etapis saata mitte ette n\u00e4htud s\u00f5numit. serverile<\/a> GSSAPI s\u00f5numi t\u00fc\u00fcp. P\u00e4rast etten\u00e4gematut GSSAPI s\u00f5numi saabumist, server<\/a> paigutab selle j\u00e4rjekorda ja ei katkesta programmide t\u00e4itmist, kuid samal ajal ei initsialiseeri muutujaid, mis m\u00e4\u00e4ravad \u00fchenduse parameetrid. Edasi liikudes toimub s\u00fcndmuste t\u00f6\u00f6tlemise ts\u00fcklis kood, mis loeb initsialiseerimata struktuuri recv_tok, mis asub virnas (loetakse andmeid, mis on j\u00e4\u00e4nud virna eelmisest funktsioonik\u00f5nest), saadab selle privileege protsessile IPC kaudu ja edastab seej\u00e4rel gss_release_buffer() funktsioonile, mis v\u00f5ib kutsuda \u00fcles free() funktsiooni ja vabastada m\u00e4lu vale n\u00e4itaja jaoks, mis suunab juhuslikku m\u00e4lupiirkonda.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c \u0432\u043e \u043c\u043d\u043e\u0433\u0438\u0445 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445 Linux \u043f\u0430\u0442\u0447\u0435 gssapi.patch, \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u043c \u0432 OpenSSH \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u043e\u0431\u043c\u0435\u043d\u0430 \u043a\u043b\u044e\u0447\u0435\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 GSSAPI, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-3497), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0440\u0430\u0437\u044b\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u044e \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f, \u043f\u043e\u0432\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u044e \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 \u043e\u0431\u0445\u043e\u0434\u0443 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u0440\u0430\u0437\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0439 (Privsep). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u0434\u043e \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u0435\u043d\u0438\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438. \u0412\u044b\u044f\u0432\u0438\u0432\u0448\u0438\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043b \u0438\u043d\u0438\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0430\u0432\u0430\u0440\u0438\u0439\u043d\u043e\u0433\u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u043d\u0430 SSH-\u0441\u0435\u0440\u0432\u0435\u0440 \u043e\u0434\u043d\u043e\u0433\u043e […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-164054","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\udd47Avastatud haavatavus OpenSSH GSSAPI-patchis, kaugelt kasutatav enne autentimist | ProHoster","description":"Linuxi paljuski distributsioonides kasutatavas gssapi.patchis, mis lisab OpenSSH-le GSSAPI-p\u00f5hise v\u00f5tmevahetuse toe, on avastatud haavatavus (CVE-2026-3497), mis viib ponteerimise dekodeerimise, m\u00e4lukahjustuse ja privileegide jagamise (Privsep) mehhanismi ringi minemise v\u00f5imaluseni. Haavatavust saab kaugelt kasutada enne autentimise toimumist. Probleemi avastanud teadlane demonstreeris protsessi kokkuvarisemise k\u00e4ivitamist, saates SSH-serverile \u00fche","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimost-v-gssapi-patche-k-openssh-udalyonno-ekspluatiruemaya-na-stadii-do-autentifikaczii","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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 GSSAPI-\u043f\u0430\u0442\u0447\u0435 \u043a OpenSSH, \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u043c\u0430\u044f \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u0434\u043e \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 | ProHoster","og:description":"\u0412 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c \u0432\u043e \u043c\u043d\u043e\u0433\u0438\u0445 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445 Linux \u043f\u0430\u0442\u0447\u0435 gssapi.patch, \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u043c \u0432 OpenSSH \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u043e\u0431\u043c\u0435\u043d\u0430 \u043a\u043b\u044e\u0447\u0435\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 GSSAPI, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2026-3497), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0440\u0430\u0437\u044b\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u044e \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f, \u043f\u043e\u0432\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u044e \u043f\u0430\u043c\u044f\u0442\u0438 \u0438 \u043e\u0431\u0445\u043e\u0434\u0443 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 \u0440\u0430\u0437\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0439 (Privsep). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u043d\u0430 \u0441\u0442\u0430\u0434\u0438\u0438 \u0434\u043e \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u0435\u043d\u0438\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438. 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\u043e\u0434\u043d\u043e\u0433\u043e","og:url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimost-v-gssapi-patche-k-openssh-udalyonno-ekspluatiruemaya-na-stadii-do-autentifikaczii","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-03-13T09:12:02+00:00","article:modified_time":"2026-03-13T09:12:02+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts\/164054","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/comments?post=164054"}],"version-history":[{"count":2,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts\/164054\/revisions"}],"predecessor-version":[{"id":173149,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts\/164054\/revisions\/173149"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/media?parent=164054"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/categories?post=164054"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/tags?post=164054"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}