{"id":121855,"date":"2025-02-12T02:22:04","date_gmt":"2025-02-12T00:22:04","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-openssl-3-4-1-s-ustraneniem-uyazvimostej"},"modified":"2025-02-12T02:22:04","modified_gmt":"2025-02-12T00:22:04","slug":"obnovlenie-openssl-3-4-1-s-ustraneniem-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/obnovlenie-openssl-3-4-1-s-ustraneniem-uyazvimostej","title":{"rendered":"Opdatering af OpenSSL 3.4.1 med sikkerhedsrettelser","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Korrigerende versioner af kryptografibiblioteket OpenSSL 3.0.16, 3.1.8, 3.2.4, 3.3.3 og 3.4.1 er tilg\u00e6ngelige. I versionerne 3.2.4, 3.3.3 og 3.4.1 er en s\u00e5rbarhed (CVE-2024-12797) blevet rettet, som er klassificeret som h\u00f8j risiko. S\u00e5rbarheden muligg\u00f8r en MITM-angreb p\u00e5 TLS- og DTLS-forbindelser. Problemet opst\u00e5r kun i systemer, der bruger RPK (Raw Public Key, RFC 7250) til klientautentifikation. Som standard er RPK-underst\u00f8ttelse deaktiveret p\u00e5 klientsiden og server<\/a>. <\/p>\n

S\u00e5rbarheden skyldes, at OpenSSL ikke returnerer information til klienten om en fejlslagen serverautentifikation, n\u00e5r der oprettes forbindelse ved hj\u00e6lp af SSL_VERIFY_PEER-verifikationsmetoden, da forhandlingsprocessen ikke afbrydes korrekt. En angriber kan udf\u00f8re et MITM-angreb og omdirigere trafikken til sin egen v\u00e6rt i stedet for den tilt\u00e6nkte server, og klienten f\u00e5r ikke besked om, at server<\/a> den ikke er autentificeret. Problemet opst\u00e5r fra OpenSSL 3.2-grenen, hvor muligheden for at bruge RPK i stedet for X.509-certifikater blev introduceret. <\/p>\n

Derudover er s\u00e5rbarheden CVE-2024-13176 blevet rettet i OpenSSL-opdateringerne, hvilket muliggjorde angreb via sidekanaler til rekonstruktion af ECDSA's hemmelige n\u00f8gle ved at analysere forsinkelser, der opst\u00e5r under generering af digitale signaturer. S\u00e5rbarhedens kernen er, at for nogle typer elliptiske kurver, s\u00e5som NIST P-521, kan man isolere beregninger med nul \u00f8verste bits i det inverterede initialiseringsvektor (nonce) fra den samlede m\u00e6ngde, hvis behandlingstiden adskiller sig med 300 nanosekunder. <\/p>\n

For ECDSA er det nok at bestemme blot nogle f\u00e5 bits med information om initialiseringsvektoren for at udf\u00f8re et sekventielt angreb og rekonstruere hele den hemmelige n\u00f8gle. For at angrebet skal lykkes, skal angriberen have adgang til det lokale system, hvor applikationen, der genererer digitale signaturer, k\u00f8rer, eller have h\u00f8jhastighedsnetadgang til applikationen med meget lave forsinkelser. Angriberen skal ogs\u00e5 have mulighed for pr\u00e6cist at analysere tidspunktet for genereringen af et stort antal digitale signaturer, der er oprettet over kendte data.
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0414\u043e\u0441\u0442\u0443\u043f\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 OpenSSL 3.0.16, 3.1.8, 3.2.4, 3.3.3 \u0438 3.4.1. \u0412 \u0432\u0435\u0440\u0441\u0438\u044f\u0445 3.2.4, 3.3.3 \u0438 3.4.1 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-12797), \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u0432\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c MITM-\u0430\u0442\u0430\u043a\u0443 \u043d\u0430 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f TLS \u0438 DTLS. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u0445 \u0434\u043b\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0435 \u043a\u043b\u044e\u0447\u0438 RPK (Raw Public Key, RFC 7250). \u041f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\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-121855","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\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\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47 OpenSSL 3.4.1-opdatering med rettede s\u00e5rbarheder | ProHoster","description":"Korrigerende versioner af kryptografibiblioteket OpenSSL 3.0.16, 3.1.8, 3.2.4, 3.3.3 og 3.4.1 er 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