\u00cbsht\u00eb n\u00eb dispozicion nj\u00eb version korrektues i OpenSSH 9.9p2, n\u00eb t\u00eb cilin jan\u00eb eliminuar dy vulnerabilitete t\u00eb zbuluara nga kompania Qualys. Nj\u00eb shembull i p\u00ebrdorimit t\u00eb k\u00ebtyre vulnerabiliteteve \u00ebsht\u00eb demonstruar p\u00ebr t\u00eb kryer nj\u00eb sulm MITM, i cili lejon p\u00ebr redirekton e trafik avokato pet brenda veprimi t\u00eb klientit me serverin SSH, duke e drejtuar at\u00eb n\u00eb nj\u00eb server fals, duke i shp\u00ebtuar kontrollit t\u00eb \u00e7el\u00ebsave t\u00eb hostit dhe duke krijuar nj\u00eb perceptim te klienti t\u00eb lidhjes me serverin e d\u00ebshiruar (klienti SSH do t\u00eb pranoj\u00eb \u00e7el\u00ebsin e serverit fals si z\u00ebvend\u00ebsues t\u00eb \u00e7el\u00ebsit t\u00eb serverit legjitim). <\/p>\n
Vulnerabiliteti i par\u00eb (CVE-2025-26465) shkaktohet nga nj\u00eb gabim logjik n\u00eb utilitarin ssh, q\u00eb lejon t\u00eb iket kontrolli i identifikimit t\u00eb serverit dhe t\u00eb kryhet nj\u00eb sulm MITM. Problemi shfaqet q\u00eb nga radhitja OpenSSH 6.8p1 (dhjetor 2014) n\u00eb konfigurimet me opsionin VerifyHostKeyDNS t\u00eb aktivizuar. N\u00eb paketimin baz\u00eb t\u00eb OpenSSH, ky opsion \u00ebsht\u00eb i \u00e7aktivizuar nga default, por deri n\u00eb mars 2023 ka qen\u00eb e aktivizuar n\u00eb konfigurimet ssh n\u00eb FreeBSD. <\/p>\n
The essence of the problem is that in the code of the function verify_host_key_callback(), when calling the function verify_host_key(), only the error code «-1» is checked, while other codes like «-2» are ignored. As a result, the function verify_host_key_callback() can return a successful code «0» despite the error «-2» being returned by the function verify_host_key(). The error code «-2» is returned by the function verify_host_key() when there is insufficient memory. If conditions are created that lead to an inability to allocate memory in the function verify_host_key(), SSH will consider that the host key has been successfully verified. In order to create such conditions, the attacker's spoof SSH server, to which the client is redirected, returns the host key of the maximum possible size (256KB), while simultaneously exploiting a memory leak on the ssh-client side. <\/p>\n
The conditions for creating a memory leak are achieved due to the second vulnerability (CVE-2025-26466), affecting both the ssh client and server<\/a> sshd, dhe p\u00ebrdoret pa autentifikim. Ky \u00e7el\u00ebs i siguris\u00eb lejon shfryt\u00ebzimin e memories s\u00eb disponueshme t\u00eb procesit dhe krijimin e nj\u00eb ngarkese t\u00eb lart\u00eb n\u00eb CPU duke d\u00ebrguar nj\u00eb num\u00ebr t\u00eb madh paketash SSH2_MSG_PING. N\u00eb trajtimin e paketave SSH2_MSG_PING ekziston nj\u00eb rrjedhje memorjeje, e cila shfaqet duke filluar nga l\u00ebshimi i OpenSSH 9.5p1 (gusht 2023). Rrjedhja ndodh p\u00ebr shkak se p\u00ebr \u00e7do paket\u00eb 16-bajt\u00ebshe PING jepet nj\u00eb buffer 256-bajt\u00eb q\u00eb krijon p\u00ebrgjigjen, por ky buffer lirohet vet\u00ebm pasi t\u00eb p\u00ebrfundoj\u00eb negociata p\u00ebr \u00e7el\u00ebsat. Si nj\u00eb zgjidhje mbrojt\u00ebse, sugjerohet t\u00eb konfigurohen kufizime me an\u00eb t\u00eb direktivave LoginGraceTime, MaxStartups dhe PerSourcePenalties. \u0414\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0432\u044b\u043f\u0443\u0441\u043a OpenSSH 9.9p2, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u044b\u0435 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Qualys. \u041f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043d \u043f\u0440\u0438\u043c\u0435\u0440 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0434\u043b\u044f \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u0438\u044f MITM-\u0430\u0442\u0430\u043a\u0438, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043f\u0440\u0438 \u043f\u043e\u043f\u044b\u0442\u043a\u0435 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u043a SSH-\u0441\u0435\u0440\u0432\u0435\u0440\u0443, \u043f\u0435\u0440\u0435\u043d\u0430\u043f\u0440\u0430\u0432\u0438\u0442\u044c \u0442\u0440\u0430\u0444\u0438\u043a \u043d\u0430 \u0441\u043e\u0431\u0441\u0442\u0432\u0435\u043d\u043d\u044b\u0439 \u0444\u0438\u043a\u0442\u0438\u0432\u043d\u044b\u0439 \u0441\u0435\u0440\u0432\u0435\u0440, \u043e\u0431\u043e\u0439\u0442\u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0443 \u0445\u043e\u0441\u0442\u043e\u0432\u044b\u0445 \u043a\u043b\u044e\u0447\u0435\u0439 \u0438 \u0441\u043e\u0437\u0434\u0430\u0442\u044c \u0443 \u043a\u043b\u0438\u0435\u043d\u0442\u0430 \u0432\u0438\u0434\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043a \u0436\u0435\u043b\u0430\u0435\u043c\u043e\u043c\u0443 \u0441\u0435\u0440\u0432\u0435\u0440\u0443 (ssh-\u043a\u043b\u0438\u0435\u043d\u0442 \u043f\u0440\u0438\u043c\u0435\u0442 \u0445\u043e\u0441\u0442\u043e\u0432\u044b\u0439 \u043a\u043b\u044e\u0447 \u0444\u0438\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0432\u043c\u0435\u0441\u0442\u043e \u043a\u043b\u044e\u0447\u0430 […]<\/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-121998","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\udd47P\u00ebrdit\u00ebsimi OpenSSH 9.9p2 me eliminimin e mund\u00ebsis\u00eb p\u00ebr sulme MITM | ProHoster","description":"\u00cbsht\u00eb n\u00eb dispozicion nj\u00eb version korrigjues i OpenSSH 9.9p2, n\u00eb t\u00eb cilin jan\u00eb eliminuar dy vulnerabilitete t\u00eb identifikuara nga kompania Qualys. \u00cbsht\u00eb demonstruar nj\u00eb shembull p\u00ebrdorimi i k\u00ebtyre vulnerabiliteteve p\u00ebr t\u00eb kryer nj\u00eb sulm MITM, i cili lejon q\u00eb kur klienti p\u00ebrpiqet t\u00eb lidhet me nj\u00eb server SSH, trafiku t\u00eb ridrejtohet n\u00eb nj\u00eb server t\u00eb rrem\u00eb, duke anashkaluar verifikimin e \u00e7el\u00ebsave t\u00eb hostit dhe duke krijuar p\u00ebr klientin iluzionin e nj\u00eb lidhjeje me serverin e d\u00ebshiruar (klienti ssh do t\u00eb pranoj\u00eb \u00e7el\u00ebsin e hostit t\u00eb serverit t\u00eb rrem\u00eb n\u00eb vend t\u00eb \u00e7el\u00ebsit original).","canonical_url":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/obnovlenie-openssh-9-9p2-s-ustraneniem-vozmozhnosti-soversheniya-mitm-ataki","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 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Burimi: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"