{"id":110697,"date":"2023-10-09T15:10:16","date_gmt":"2023-10-09T13:10:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/novaya-versiya-pop3-i-imap4-servera-dovecot-2-3-21"},"modified":"2023-10-09T15:10:16","modified_gmt":"2023-10-09T13:10:16","slug":"novaya-versiya-pop3-i-imap4-servera-dovecot-2-3-21","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/novaya-versiya-pop3-i-imap4-servera-dovecot-2-3-21","title":{"rendered":"Den nye version af POP3- og IMAP4-serveren Dovecot 2.3.21","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Den nye version af den platformuafh\u00e6ngige, h\u00f8jt ydende POP3\/IMAP4-server Dovecot 2.3.21 er udgivet, som underst\u00f8tter protokollerne POP3 og IMAP4rev1 med popul\u00e6re udvidelser som SORT, THREAD og IDLE, samt autentificerings- og krypteringsmekanismer (SASL, TLS, SCRAM). Dovecot opretholder fuld kompatibilitet med de klassiske mbox og Maildir, ved at anvende eksterne indekser for at forbedre ydeevnen. Plugins kan anvendes for at udvide funktionaliteten (f.eks. er kvoter og ACL implementeret via plugins). Projektkoden distribueres under LGPL- og MIT-licenser.      <\/p>\n<p>Vigtige \u00e6ndringer:  <\/p>\n<ul>\n<li class=\"l\"> lib-oauth2: Kontrol af JWT-tokens med det manglende felt &#171;typ&#187; er nu tilladt. Feltet &#171;typ&#187; bruges ikke af nogle n\u00f8gleudstedere for at spare plads, is\u00e6r Kubernetes. Nu er frav\u00e6ret af &#171;typ&#187; tilladt, men hvis det er til stede, skal det stadig v\u00e6re &#171;jwt&#187;.\n<li class=\"l\"> auth: Svaret &#171;Auth&#187; fra passdb og userdb kan indeholde v\u00e6rdien &#171;event_&lt;name&gt;=value&#187;, som vil blive tilf\u00f8jet til login-begivenheden og mailbrugerens begivenhed henholdsvis.\n<li class=\"l\"> lib-master: S\u00e6tter processens header p\u00e5 forskellige initialiseringstrin for at pr\u00e6cisere, hvad processen forventer.\n<li class=\"l\"> lib-storage: mail_temp_scan_interval \u00f8ges nu med 0\u202630% afh\u00e6ngigt af hash-v\u00e6rdien af brugernavnet for at mindske risikoen for belastningsspidser.\n<li class=\"l\"> lib-storage: Scanning af midlertidige filer er flyttet fra \u00e5bningen af postkassen til lukningen af den for at reducere den forsinkelse, som brugerne oplever.\n<li class=\"l\"> stats: Hvis felter er angivet i metrikken, eksporteres alle disse felter som t\u00e6llere til Prometheus i eksponeringsformat.\n<li class=\"l\"> &#171;*-login&#187;: Processerne kunne fejle ved en uforsigtig nedbrydning af SSL-forbindelsen.    &#8212; acl: Ved indl\u00e6sning af plugins blev flagene &#092;&#092;HasChildren og &#092;&#092;HasNoChildren beregnet forkert for mailbokse, der indeholdt &#8216;*&#8217; og &#8216;%&#8217; i deres navn.\n<li class=\"l\"> auth: Der opstod en fejltagelse ved en mislykket forbindelse til PostgreSQL-databasen under opstart.\n<li class=\"l\"> auth: Ved login med forkerte adgangskoder (for eksempel med en ukendt skema) blev der i stedet for &#171;intern fejl&#187; givet fejlmeddelelsen &#171;password mismatch&#187; i passdb.\n<li class=\"l\"> auth: XOAUTH2- og OAUTHBEARER-mekanismerne gav ikke en protokolspecifik fejlmeddelelse ved nogen fejl. Dette gjorde det is\u00e6r vanskeligt at opdage OIDC.\n<li class=\"l\"> dbox: Hvis overskriften last_temp_file_scan ikke var blevet indstillet (is\u00e6r efter dsync-migrering), ville scanningen af midlertidige filer altid starte ved n\u00e6ste \u00e5bning af postkassen. Dette kunne for\u00e5rsage spidser i belastningen efter migreringerne. Problemet er l\u00f8st ved at bruge atime fra postkassens mappe, n\u00e5r overskriften er frav\u00e6rende, hvilket typisk skubber tidspunkterne for scanning fremad.\n<li class=\"l\"> dict-redis: Der opstod en fejl ved tilbageskud af transaktioner.\n<li class=\"l\">  dsync: Ved sletning af postkassen p\u00e5 den fjerne ende, n\u00e5r niveau-separatorerne i hierarkiet ikke matchede, opstod der en uendelig l\u00f8kke, der f\u00f8rte til hukommelsesfejl.\n<li class=\"l\"> dsync: Inkrementel dsync blev ikke udf\u00f8rt for mappenavne, der endte p\u00e5 &#8216;%&#8217;, medmindre v\u00e6rdien BROKENCHAR var indstillet. Ogs\u00e5 mappenavne med &#8216;%&#8217; andre steder f\u00f8rte til un\u00f8dvendig omben\u00e6vnelse af mappen til et midlertidigt navn og tilbage ved hver inkrementel dsync. Regression v2.3.19.\n<li class=\"l\">  imap-hibernate: Hvis der opstod timeout under l\u00e5sning af IMAP-klienten med meddelelsen &#171;(version received)&#187;, kunne opl\u00e5sningsprocessen senere afsluttes med succes og forts\u00e6tte normal drift. Dette f\u00f8rte til forvirring, da imap-hibernate allerede havde registreret, at klienten var blevet afbrudt. Dette kan undg\u00e5s ved at tvinge forbindelsen til at afslutte efter timeout ved afslutning af dvaletilstand.\n<li class=\"l\"> imapc: Nedbrud ved forsvinden af en mappe fra lageret, vist gennem en virtuel plugin.\n<li class=\"l\"> imapc: Svarene EXPUNGE, EXISTS eller FETCH med <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/server\/dts-los-angeles\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3724\">server<\/a> for den tidligere valgte postkasse kunne blive behandlet som om de tilh\u00f8rte den nye postkasse, der blev valgt i \u00f8jeblikket. Dette kunne f\u00f8re til advarsler.\n<li class=\"l\"> lib-http: Dovecots HTTP-server (doveadm, stats\/openmetrics) kunne afbryde HTTP-klienter f\u00f8r fuld sending af svaret. Dette skete kun p\u00e5 overbelastede servere, hvor kerne-socketbufferne var kraftigt overfyldte.\n<li class=\"l\"> lib-http: Potentielt nedbrud af http-serveren ved tidlig afbrydelse af klienten er blevet rettet. Regression i 2.3.18.\n<li class=\"l\"> lib-index: Korruption af indexfilen kunne f\u00f8re til nedbrud. L\u00f8st: Panic: file mail-transaction-log-view.c: line 165 (mail_transaction_log_view_set): assertion failed: (min_file_seq &lt;= max_file_seq).\n<li class=\"l\">  lib-index: Rensning af eksisterende cache-fil st\u00f8rre end 1 GB kunne f\u00f8re til nedbrud. Nu fjernes cache-filer, der stadig overstiger 1 GB, efter rensningen. Rettelse: Panic: file mail-index-util.c: line 10 (mail_index_uint32_to_offset): assertion failed: (offset &lt; 0x40000000).\n<li class=\"l\"> lib-lua: HTTP-klienten kunne ikke bestemme DNS-navne i mailprocesser, da den forventede, at soklen &#171;dns-client&#187; ville v\u00e6re i den nuv\u00e6rende mappe.\n<li class=\"l\"> lib-oauth2: Dovecot sendte client_id og client_secret som POST-parametre til introspektionsserveren. Dog var brugen af dem ved Basic auth frivillig.\n<li class=\"l\"> lib-oauth2: Validering af JWT &#171;aud&#187; blev ikke udf\u00f8rt, hvis &#171;aud&#187; ikke var til stede i tokenet, men var konfigureret i Dovecot.\n<li class=\"l\"> lib-oauth2: For striks kontrol af JWT-n\u00f8gletypen.\n<li class=\"l\"> lib-oauth2: Publikum for JWT-token blev ikke kontrolleret for overensstemmelse med client_id, som specifikationen kr\u00e6ver.\n<li class=\"l\"> lib-ssl-iostream: Brug af parameteren ssl_require_crl=yes kunne f\u00f8re til fejl i CRL-kontrollen for udg\u00e5ende SSL\/TLS-forbindelser, selvom det menes at p\u00e5virke CRL-kontrollen kun for klienter. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/da\/ssl-sertifikat\/\"   title=\"SSL certificates\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"345\">SSL certificates<\/a>. v2.3.17 regression.\n<li class=\"l\"> lib-sql: MySQL-driveren tillod hukommelsesl\u00e6kage ved mislykket forbindelse.\n<li class=\"l\"> lib-storage: Forskellige rettelser ved pladsmangel p\u00e5 disken.\n<li class=\"l\"> master: Konfigurationen af idle_kill tjenesten fungerede ikke korrekt p\u00e5 belastede servere. Det var meget usandsynligt, at nogen proces var inaktiv l\u00e6nge nok til at blive dr\u00e6bt. Desuden brugte idle_kill-koden en betydelig m\u00e6ngde CPU p\u00e5 hovedprocessen ved et stort antal processer (for eksempel imap). Nu vil enhver idle_kill-interval overv\u00e5ge det mindste antal inaktive processer og derefter dr\u00e6be det antal.\n<li class=\"l\"> mdbox: Kontrollen af midlertidige filer blev udf\u00f8rt for altid tomme mapper.\n<li class=\"l\"> mdbox: Ved skrivning af e-mails blev fdatasync() kaldt i den forkerte overordnede mappe. Ogs\u00e5 under en fejl opstod der et nedbrud i stedet for at registrere en fejl i loggen.\n<li class=\"l\"> notify_status: Pluginet fejler ved mislykket brugerinitialisering.    &#8212; pop3: Sending kommandoen med symbolet &#8216;:&#8217; f\u00f8rte til et &#171;assert-crash&#187;. Regression i version 2.3.18.\n<li class=\"l\"> stats: Panikken, der opstod ved henvendelse til en ikke-eksisterende begivenhedsekport\u00f8r ved dynamisk tilf\u00f8jelse af en ny metrisk v\u00e6rdi med kommandoen &#171;doveadm stats add&#187;, er blevet l\u00f8st. Nu gives der en korrekt fejlmeddelelse.\n<li class=\"l\"> stats: Hvis processen har eksporteret mange h\u00e6ndelser og derefter stoppet, kan nogle af de seneste h\u00e6ndelser v\u00e6re g\u00e5et tabt.\n<li class=\"l\"> stats: Ugyldige Prometheus etiketter blev genereret under visse konfigurationer af histogram group_by. Prometheus afviste disse etiketter.\n<li class=\"l\"> welcome: Plugin'et blev ikke udf\u00f8rt i visse situationer, n\u00e5r INBOX blev oprettet, men ikke \u00e5bnet, for eksempel hvis GETMETADATA blev brugt inden \u00e5bningen af INBOX.  <\/ul>\n<p>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=59895\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430 \u043d\u043e\u0432\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f \u043c\u043d\u043e\u0433\u043e\u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0435\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u0441\u043e\u043a\u043e\u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e POP3\/IMAP4-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Dovecot 2.3.21, \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u044b POP3 \u0438 IMAP4rev1 \u0441 \u043f\u043e\u043f\u0443\u043b\u044f\u0440\u043d\u044b\u043c\u0438 \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u044f\u043c\u0438, \u0442\u0430\u043a\u0438\u043c\u0438 \u043a\u0430\u043a SORT, THREAD \u0438 IDLE, \u0438 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430\u043c\u0438 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0438 \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u044f (SASL, TLS, SCRAM). Dovecot \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u0435\u0442 \u043f\u043e\u043b\u043d\u0443\u044e \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u044c \u0441 \u043a\u043b\u0430\u0441\u0441\u0438\u0447\u0435\u0441\u043a\u0438\u043c\u0438 mbox \u0438 Maildir, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u044f \u0432\u043d\u0435\u0448\u043d\u0438\u0435 \u0438\u043d\u0434\u0435\u043a\u0441\u044b \u0434\u043b\u044f \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438. \u0414\u043b\u044f \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u043c\u043e\u0433\u0443\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u043f\u043b\u0430\u0433\u0438\u043d\u044b (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0447\u0435\u0440\u0435\u0437 \u043f\u043b\u0430\u0433\u0438\u043d\u044b \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u044b [&hellip;]<\/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-110697","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430 \u043d\u043e\u0432\u0430\u044f \u0432\u0435\u0440\u0441\u0438\u044f \u043c\u043d\u043e\u0433\u043e\u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0435\u043d\u043d\u043e\u0433\u043e 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