{"id":37194,"date":"2019-10-31T22:16:17","date_gmt":"2019-10-31T19:16:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/reliz-http-servera-apache-2-4-41-s-ustraneniem-uyazvimostej\/"},"modified":"2019-10-31T22:16:17","modified_gmt":"2019-10-31T19:16:17","slug":"reliz-http-servera-apache-2-4-41-s-ustraneniem-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/reliz-http-servera-apache-2-4-41-s-ustraneniem-uyazvimostej","title":{"rendered":"Udgivelse af http-serveren Apache 2.4.41 med s\u00e5rbarhedslukninger","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/announce@httpd.apache.org\/msg00139.html\">Publiceret<\/a><\/noindex> Udgivelsen af HTTP-serveren Apache 2.4.41 (udgivelse 2.4.40 blev sprunget over), hvor der er pr\u00e6senteret <noindex><a rel=\"nofollow\" href=\"http:\/\/www.apache.org\/dist\/httpd\/CHANGES_2.4.41\">23 \u00e6ndringer<\/a><\/noindex> og har rettet <noindex><a rel=\"nofollow\" href=\"http:\/\/httpd.apache.org\/security\/vulnerabilities_24.html\">6 s\u00e5rbarheder<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\">  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/announce@httpd.apache.org\/msg00140.html\">CVE-2019-10081<\/a><\/noindex> \u2014 der er et problem med mod_http2, som kan f\u00f8re til hukommelsesskader ved at sende push-foresp\u00f8rgsler i en meget tidlig fase. Ved brug af indstillingen \u201eH2PushResource\u201c kan der ske en overskrivning af hukommelsesomr\u00e5det i foresp\u00f8rgselsbehandlingspuljen, men problemet er begr\u00e6nset til en nedbrud, da de data, der skrives, ikke er baseret p\u00e5 information modtaget fra klienten;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/announce@httpd.apache.org\/msg00145.html\">CVE-2019-9517<\/a><\/noindex> \u2014 s\u00e5rbarhed opdaget for nylig <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51279\">annonceret<\/a><\/noindex> DoS-s\u00e5rbarhed i implementeringerne af HTTP\/2.<br \/>\nEn angriber kan udt\u00f8mme den tilg\u00e6ngelige hukommelse for processen og skabe en stor belastning p\u00e5 CPU'en ved at \u00e5bne et glidende vindue for HTTP\/2 til at sende data fra serveren uden begr\u00e6nsninger, mens TCP-vinduet forbliver lukket, hvilket forhindrer data i at blive skrevet til socket; <\/p>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/announce@httpd.apache.org\/msg00144.html\">CVE-2019-10098<\/a><\/noindex> \u2014 der er et problem med mod_rewrite, der muligg\u00f8r, at serveren kan videresende anmodninger til andre ressourcer (open redirect). Nogle indstillinger i mod_rewrite kan f\u00f8re til, at brugeren ledes til et andet link, der er kodet med et linjeskift-tegn inden for parameteren, der anvendes i den eksisterende omdirigering. For at blokere problemet kan flaget PCRE_DOTALL bruges i RegexDefaultOptions, som nu er indstillet som standard;\n<li class=\"l\">  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/announce@httpd.apache.org\/msg00142.html\">CVE-2019-10092<\/a><\/noindex> \u2014 mulighed for at udf\u00f8re cross-site scripting p\u00e5 fejlsk\u00e6rme vist af mod_proxy. P\u00e5 disse sider inds\u00e6ttes den URL, der er modtaget fra foresp\u00f8rgslen, i linket, hvor en angriber via karakterescapning kan inds\u00e6tte vilk\u00e5rlig HTML-kode;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/announce@httpd.apache.org\/msg00143.html\">CVE-2019-10097<\/a><\/noindex> \u2014 stakoverl\u00f8b og dereferencering af NULL-peger i mod_remoteip, der udnyttes gennem manipulation af PROXY-protokoloverskriften. Angrebet kan kun udf\u00f8res fra den proxy-server, der er blevet brugt i indstillingerne, og ikke gennem klientens foresp\u00f8rgsel;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/announce@httpd.apache.org\/msg00141.html\">CVE-2019-10082<\/a><\/noindex> \u2014 s\u00e5rbarhed i mod_http2, der muligg\u00f8r l\u00e6sning af indhold fra allerede frigivet hukommelsesomr\u00e5de (read-after-free) p\u00e5 det tidspunkt, hvor forbindelsen afsluttes.\n<\/ul>\n<p>De mest markante \u00e6ndringer, der ikke vedr\u00f8rer sikkerhed: <\/p>\n<ul>\n<li class=\"l\"> I mod_proxy_balancer er beskyttelsen mod XSS\/XSRF-angreb fra betroede noder blevet styrket;\n<li class=\"l\"> I mod_session er der tilf\u00f8jet en indstilling for SessionExpiryUpdateInterval til at bestemme opdateringsintervallet for udl\u00f8bstidspunktet for sessioner\/cookies;\n<li class=\"l\"> Der er udf\u00f8rt en oprydning af fejl-sider, der har til form\u00e5l at udelukke udskrivning af oplysninger fra anmodninger p\u00e5 disse sider;\n<li class=\"l\"> I mod_http2 er der blevet taget h\u00f8jde for v\u00e6rdien af parameteren \u201eLimitRequestFieldSize\u201c, som tidligere kun gjaldt for kontrol af HTTP\/1.1 headerfelter;\n<li class=\"l\"> Der er sikret oprettelse af konfigurationen mod_proxy_hcheck ved brug af BalancerMember;\n<li class=\"l\"> Hukommelsesforbruget i mod_dav er blevet reduceret ved brug af PROPFIND-kommandoen over en stor samling;\n<li class=\"l\"> Problemer med angivelse af certifikatindstillinger og SSL i mod_proxy og mod_ssl er blevet l\u00f8st inden for Proxy-blokken;\n<li class=\"l\"> Der er tilladt anvendelse af SSLProxyCheckPeer*-indstillinger i mod_proxy for alle proxy-moduler;\n<li class=\"l\"> Mulighederne for modulet <noindex><a rel=\"nofollow\" href=\"https:\/\/httpd.apache.org\/docs\/2.4\/mod\/mod_md.html\">mod_md<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=47403\">udviklet<\/a><\/noindex> projektet Let\u2019s Encrypt til automatisering af erhvervelse og vedligeholdelsessertifikater ved hj\u00e6lp af ACME-protokollen (Automatic Certificate Management Environment):\n<ul>\n<li class=\"l\"> Den anden version af protokollen <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=48255\">ACMEv2<\/a><\/noindex>, som nu anvendes som standard, og <noindex><a rel=\"nofollow\" href=\"https:\/\/community.letsencrypt.org\/t\/acme-v2-scheduled-deprecation-of-unauthenticated-resource-gets\/74380\">bruger<\/a><\/noindex> tomme POST-anmodninger i stedet for GET.\n<li class=\"l\"> Der er tilf\u00f8jet st\u00f8tte til validering baseret p\u00e5 TLS-ALPN-01-udvidelsen (RFC 7301, Application-Layer Protocol Negotiation), som bruges i HTTP\/2.\n<li class=\"l\"> St\u00f8tten til kontrolmetoden \u2018tls-sni-01\u2019 er blevet stoppet (p\u00e5 grund af <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=47883\">s\u00e5rbarheder<\/a><\/noindex>).\n<li class=\"l\"> Der er tilf\u00f8jet kommandoer til konfiguration og opsigelse af kontrolmetoden \u2018dns-01\u2019.\n<li class=\"l\"> Tilf\u00f8jet support for <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=46817\">masker<\/a><\/noindex> i certifikater ved aktivering af DNS-baseret kontrol (\u2018dns-01\u2019).\n<li class=\"l\"> Der er implementeret en behandling af \u2018md-status\u2019 og en side med status for certifikatet \u201ehttps:\/\/domain\/.httpd\/certificate-status\u201c.\n<li class=\"l\">  Der er tilf\u00f8jet direktiverne \u201eMDCertificateFile\u201c og \u201eMDCertificateKeyFile\u201c til at konfigurere dom\u00e6neindstillinger via statiske filer (uden support til automatisk opdatering).\n<li class=\"l\"> En direktiv &#171;MDMessageCmd&#187; er blevet tilf\u00f8jet til opkald af eksterne kommandoer ved h\u00e6ndelserne &#8216;renewed&#8217;, &#8216;expiring&#8217; eller &#8216;errored&#8217;.\n<li class=\"l\"> En direktiv &#171;MDWarnWindow&#187; er blevet tilf\u00f8jet til at konfigurere meddelelsen med advarsel om udl\u00f8bet af certifikatets gyldighed;\n<\/ul>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Kilde: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51298\">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 \u0440\u0435\u043b\u0438\u0437 HTTP-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Apache 2.4.41 (\u0432\u044b\u043f\u0443\u0441\u043a 2.4.40 \u0431\u044b\u043b \u043f\u0440\u043e\u043f\u0443\u0449\u0435\u043d), \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043e 23 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e 6 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439: CVE-2019-10081 &#8212; \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432 mod_http2, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043f\u043e\u0432\u0440\u0435\u0436\u0434\u0435\u043d\u0438\u044e \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u0438 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0435 push-\u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043d\u0430 \u043e\u0447\u0435\u043d\u044c \u0440\u0430\u043d\u043d\u0435\u0439 \u0441\u0442\u0430\u0434\u0438\u0438. \u041f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 &#171;H2PushResource&#187; \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u0430 \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u044c \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u0432 \u043f\u0443\u043b\u0435 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432, \u043d\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0430 \u043a\u0440\u0430\u0445\u043e\u043c, \u0442\u0430\u043a \u043a\u0430\u043a \u0437\u0430\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u043c\u044b\u0435 [&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-37194","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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