{"id":172666,"date":"2026-05-19T00:24:49","date_gmt":"2026-05-18T22:24:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-exim-4-99-3-ustranena-uyazvimost-pozvolyayushhaya-udalyonnoe-vypolnenie-koda-pri-ispolzovanii-gnutls"},"modified":"2026-05-19T00:24:49","modified_gmt":"2026-05-18T22:24:49","slug":"v-exim-4-99-3-ustranena-uyazvimost-pozvolyayushhaya-udalyonnoe-vypolnenie-koda-pri-ispolzovanii-gnutls","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/v-exim-4-99-3-ustranena-uyazvimost-pozvolyayushhaya-udalyonnoe-vypolnenie-koda-pri-ispolzovanii-gnutls","title":{"rendered":"Exim 4.99.3 on parandatud haavatavus, mis v\u00f5imaldab kaugteostusta kodu kaudu GnuTLSi kasutamisel.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Eximi arendajad on v\u00e4lja andnud parandava versiooni. Exim 4.99.3<\/strong>, mis k\u00f5rvaldab haavatavuse m\u00f5nedes e-posti agendi konfiguratsioonides. Probleem on sisemise identifikaatori all EXIM-Security-2026-05-01.1<\/strong>; ametlikus teates kajastub ka kui CVE-TBD<\/strong>.<\/p>\n

Haavatavus kuulub klassi Remote Use-After-Free<\/strong> ja avaldub s\u00f5numi keha anal\u00fc\u00fcsimisel BDAT<\/strong> GnuTLSi kaudu TLS-i kasutamisel. GnuTLS<\/strong>. BDAT-i kasutatakse SMTP laienduses CHUNKING<\/strong> kiri keha edastamiseks plokkidena. Eximi kirjelduse kohaselt v\u00f5ib viga olla p\u00f5hjustatud, kui klient BDAT'i edastamise ajal saadab TLS-i teate close_notify enne keha edastamise l\u00f5petamist ja seej\u00e4rel lisab t\u00e4iendava biti samas TCP-\u00fchenduses.<\/p>\n

Sellise j\u00e4rjekorraga v\u00f5ib Exim kirjutada andmeid m\u00e4llu, mis on juba vabastatud TLS-istseeni l\u00f5petamisel. See viib m\u00e4lu rikutusele ja v\u00f5ib potentsiaalselt v\u00f5imaldada koodi k\u00e4ivitamist. Teates r\u00f5hutatakse, et r\u00fcndajal peab olema piisavalt v\u00f5imalusi luua TLS-\u00fchendus ja kasutada SMTP laiendust. CHUNKING \/ BDAT<\/strong>.<\/p>\n

Probleem m\u00f5jutab Exim 4.97, 4.98, 4.99, 4.99.1 ja 4.99.2<\/strong>, kuid ainult koos toega kogudes, mis on builditud GnuTLS<\/strong>. Ametlikes dokumentides on see s\u00f5nastatud konfiguratsioonidena, kus on USE_GNUTLS=yes; kogud, mis kasutavad OpenSSL<\/strong> v\u00f5i muid TLS raamatukogusid, ei ole sellest haavatavad. Samuti on Exim teates \u00fckshaaval mainitud, et haavatavad on konfiguratsioonid, kus kuulutatakse STARTTLS<\/strong> ja CHUNKING<\/strong>.<\/p>\n

Parandus on sisse v\u00f5etud Exim 4.99.3<\/strong>. Arendajate kirjelduste kohaselt garanteerib patch puhta sisendi t\u00f6\u00f6tlemise aluse l\u00e4htestamise, kui saadakse TLS close_notify aktiivse BDAT edastamise ajal, mis takistab vana viidatud edasist kasutamist. Pole teada muid tuntud viise probleemi t\u00e4ielikuks sulgemiseks, v\u00e4lja arvatud uuendamine, soovitustes ei tooda.<\/p>\n

Eximi arendajad on saanud vea teate 1. mai 2026<\/strong> Federico Kirschbaumi poolt XBOW Security<\/strong>. P\u00e4rast aruande kontrollimist viidi parandused l\u00e4bi suletud hoidlates. 7. mail teavitati probleemi kohta distributsioone suletud postitusloendi kaudu, 10. mail sai neile piiratud juurdep\u00e4\u00e4su parandustele, 12. mai 2026<\/strong> oli soovitatav soovituste ja v\u00e4ljaande avaldamine parandusega.<\/p>\n

Postiserverite administraatoritele soovitatakse kontrollida kasutatavat Eximi versiooni ja TLS-taustkoodi. Kui server<\/a> kasutatakse Eximi versiooni vahemikus 4.97 kuni 4.99.2, mis on koostatud GnuTLS-i ja kuulutab STARTTLS-i koos CHUNKING-iga, soovitab Eximi projekt v\u00f5imalikult kiiresti \u00fcle minna Exim 4.99.3<\/strong> v\u00f5i uuemale versioonile. Parandatud l\u00e4htekoodid on saadaval exim-4.99+fixes harus ja exim-4.99.3 sildis, samuti tarball-archives tavap\u00e4rastel Eximi allalaadimise saitidel.<\/p>\n

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

\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 Exim \u0432\u044b\u043f\u0443\u0441\u0442\u0438\u043b\u0438 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0440\u0435\u043b\u0438\u0437 Exim 4.99.3, \u0443\u0441\u0442\u0440\u0430\u043d\u044f\u044e\u0449\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u044f\u0445 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0430\u0433\u0435\u043d\u0442\u0430. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u0445\u043e\u0434\u0438\u0442 \u043f\u043e\u0434 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0438\u043c \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u043c EXIM-Security-2026-05-01.1; \u0432 \u043e\u0444\u0438\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u043c \u0443\u0432\u0435\u0434\u043e\u043c\u043b\u0435\u043d\u0438\u0438 \u0442\u0430\u043a\u0436\u0435 \u0444\u0438\u0433\u0443\u0440\u0438\u0440\u0443\u0435\u0442 \u043a\u0430\u043a CVE-TBD. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0441\u044f \u043a \u043a\u043b\u0430\u0441\u0441\u0443 Remote Use-After-Free \u0438 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u0440\u0438 \u0440\u0430\u0437\u0431\u043e\u0440\u0435 \u0442\u0435\u043b\u0430 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f BDAT \u043f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 TLS \u0447\u0435\u0440\u0435\u0437 GnuTLS. BDAT \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0432 SMTP-\u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u0438 CHUNKING \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u0442\u0435\u043b\u0430 […]<\/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-172666","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\udd47Exim 4.99.3 k\u00f5rvaldab GnuTLS-i kasutamisega seotud koodide kaugk\u00e4itamise haavatavuse | ProHoster","description":"Exim-i postiserveri arendajad on v\u00e4lja andnud Exim 4.99.3 paranduse, mis k\u00f5rvaldab haavatavuse teatud postivahendi konfiguratsioonides. Probleem on sisemiselt identifitseeritud kui EXIM-Security-2026-05-01.1; ametlikus teates on see samuti m\u00e4rgitud kui CVE-TBD. Haavatavus kuulub Remote Use-After-Free klassi ja ilmneb s\u00f5numi keha BDAT anal\u00fc\u00fcsimisel TLS-i kaudu t\u00f6\u00f6tades GnuTLS-iga. BDAT-i kasutatakse SMTP laienduses CHUNKING keha edastamiseks.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/v-exim-4-99-3-ustranena-uyazvimost-pozvolyayushhaya-udalyonnoe-vypolnenie-koda-pri-ispolzovanii-gnutls","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\u0412 Exim 4.99.3 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a\u043e\u0434\u0430 \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 GnuTLS | ProHoster","og:description":"\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 Exim \u0432\u044b\u043f\u0443\u0441\u0442\u0438\u043b\u0438 \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0440\u0435\u043b\u0438\u0437 Exim 4.99.3, \u0443\u0441\u0442\u0440\u0430\u043d\u044f\u044e\u0449\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u044f\u0445 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0430\u0433\u0435\u043d\u0442\u0430. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u0445\u043e\u0434\u0438\u0442 \u043f\u043e\u0434 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0438\u043c \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u043c EXIM-Security-2026-05-01.1; \u0432 \u043e\u0444\u0438\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u043c \u0443\u0432\u0435\u0434\u043e\u043c\u043b\u0435\u043d\u0438\u0438 \u0442\u0430\u043a\u0436\u0435 \u0444\u0438\u0433\u0443\u0440\u0438\u0440\u0443\u0435\u0442 \u043a\u0430\u043a CVE-TBD. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0441\u044f \u043a \u043a\u043b\u0430\u0441\u0441\u0443 Remote Use-After-Free \u0438 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u0440\u0438 \u0440\u0430\u0437\u0431\u043e\u0440\u0435 \u0442\u0435\u043b\u0430 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f BDAT \u043f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 TLS \u0447\u0435\u0440\u0435\u0437 GnuTLS. 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