{"id":102701,"date":"2021-12-22T09:36:38","date_gmt":"2021-12-22T07:36:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-http-servera-apache-2-4-52-s-ustraneniem-perepolneniya-bufera-v-mod_lua"},"modified":"2021-12-22T09:36:38","modified_gmt":"2021-12-22T07:36:38","slug":"reliz-http-servera-apache-2-4-52-s-ustraneniem-perepolneniya-bufera-v-mod_lua","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/reliz-http-servera-apache-2-4-52-s-ustraneniem-perepolneniya-bufera-v-mod_lua","title":{"rendered":"Lansarea server-ului http Apache 2.4.52 cu remedierea suprasarcinii \u00een mod_lua","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A fost lansat\u0103 versiunea 2.4.52 a serverului HTTP Apache, care include 25 de modific\u0103ri \u0219i corecteaz\u0103 2 vulnerabilit\u0103\u021bi:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2021-44790 \u2014 o dep\u0103\u0219ire a buffer-ului \u00een mod_lua, manifestat\u0103 \u00een timpul analiz\u0103rii cererilor compuse din mai multe p\u0103r\u021bi (multipart). Vulnerabilitatea afecteaz\u0103 configura\u021biile \u00een care scripturile Lua apeleaz\u0103 func\u021bia r:parsebody() pentru a analiza corpul cererii \u0219i permite unui atacator s\u0103 provoace dep\u0103\u0219irea buffer-ului prin trimiterea unei cereri special concepute. P\u00e2n\u0103 acum nu s-au identificat dovezi ale unui exploit, dar problema ar putea duce poten\u021bial la executarea de cod propriu. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/ro\/server\/dts-newyork\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2693\">server<\/a>.\n<li class=\"l\"> CVE-2021-44224 \u2014 vulnerabilitate SSRF (Server Side Request Forgery) \u00een mod_proxy, care permite, \u00een configura\u021biile cu setarea \u201eProxyRequests on\u201d, printr-o cerere cu un URI special conceput, redirectarea cererii c\u0103tre un alt handler pe acela\u0219i server, care accept\u0103 conexiuni prin Unix Domain Socket. Problema poate fi folosit\u0103 \u0219i pentru a provoca o eroare prin crearea condi\u021biilor necesare pentru dereferirea unui pointer null. Problema afecteaz\u0103 versiunile Apache httpd \u00eencep\u00e2nd cu versiunea 2.4.7.    <\/ul>\n<p>Cele mai notabile modific\u0103ri, nelegate de securitate:   <\/p>\n<ul>\n<li class=\"l\"> \u00cen mod_ssl a fost ad\u0103ugat\u0103 suportul pentru compilarea cu biblioteca OpenSSL 3.\n<li class=\"l\"> A fost \u00eembun\u0103t\u0103\u021bit\u0103 identificarea bibliotecii OpenSSL \u00een scripturile autoconf.\n<li class=\"l\"> \u00cen mod_proxy pentru protocoalele de tunelare a fost introdus\u0103 op\u021biunea de a dezactiva redirectarea conexiunilor TCP semi-\u00eenchise (half-close) prin setarea parametrului \u201eSetEnv proxy-nohalfclose\u201d.\n<li class=\"l\"> Au fost ad\u0103ugate verific\u0103ri suplimentare pentru a se asigura c\u0103 URI-urile care nu sunt destinate proxying-ului con\u021bin schema http\/https, iar cele destinate proxying-ului con\u021bin numele gazdelor.\n<li class=\"l\"> \u00cen mod_proxy_connect \u0219i mod_proxy a fost interzis\u0103 modificarea codului de stare dup\u0103 ce acesta a fost trimis clientului.\n<li class=\"l\"> La trimiterea r\u0103spunsurilor intermediare dup\u0103 primirea cererilor cu antetul \u201eExpect: 100-Continue\u201d s-a asigurat indicarea \u00een rezultat a st\u0103rii \u201e100 Continue\u201d, \u0219i nu a st\u0103rii curente a cererii.\n<li class=\"l\"> \u00cen mod_dav a fost ad\u0103ugat\u0103 suportul pentru extensiile CalDAV, \u00een care la generarea propriet\u0103\u021bilor trebuie s\u0103 se \u021bin\u0103 cont at\u00e2t de elementele documentului, c\u00e2t \u0219i de elementele propriet\u0103\u021bii. Au fost ad\u0103ugate noi func\u021bii dav_validate_root_ns(), dav_find_child_ns(), dav_find_next_ns(), dav_find_attr_ns() \u0219i dav_find_attr(), care pot fi apelate din alte module.\n<li class=\"l\"> \u00cen mpm_event a fost rezolvat\u0103 problema cu oprirea proceselor copil inactive dup\u0103 un v\u00e2rf de sarcin\u0103 pe server.\n<li class=\"l\"> \u00cen mod_http2 au fost corectate schimb\u0103rile regresive care duceau la comportamente incorecte \u00een gestionarea limit\u0103rilor MaxRequestsPerChild \u0219i MaxConnectionsPerChild.\n<li class=\"l\"> Func\u021bionalit\u0103\u021bile modulului mod_md, utilizat pentru automatizarea ob\u021binerii \u0219i \u00eentre\u021binerii certificatelor prin protocolul ACME (Automatic Certificate Management Environment), au fost extinse:\n<ul>\n<li class=\"l\"> A fost ad\u0103ugat\u0103 suportul pentru mecanismul ACME External Account Binding (EAB), activat prin directiva MDExternalAccountBinding. Valorile pentru EAB pot fi configurate dintr-un fi\u0219ier extern \u00een format JSON, ceea ce permite neexpunerea parametrilor de autentificare \u00een fi\u0219ierul principal. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/ro\/server\/\"   title=\"al configura\u021biei serverului\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"997\">al configura\u021biei serverului<\/a>.\n<li class=\"l\"> \u00cen directiva 'MDCertificateAuthority' a fost introdus\u0103 verificarea specific\u0103rii \u00een parametrul URL http\/https sau a uneia dintre numele predefinite ('LetsEncrypt', 'LetsEncrypt-Test', 'Buypass' \u0219i 'Buypass-Test').\n<li class=\"l\">  A fost permis\u0103 specificarea directivei MDContactEmail \u00een interiorul sec\u021biunii .\n<li class=\"l\"> Au fost corectate mai multe erori, inclusiv o scurgere de memorie care ap\u0103rea \u00een cazul unor e\u0219ecuri la \u00eenc\u0103rcarea cheii private.  <\/ul>\n<\/ul>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56387\">opennet.ro<\/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 2.4.52, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043e 25 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b 2 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2021-44790 &#8212; \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 mod_lua, \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0449\u0435\u0435\u0441\u044f \u043f\u0440\u0438 \u0440\u0430\u0437\u0431\u043e\u0440\u0435 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432, \u0441\u043e\u0441\u0442\u043e\u044f\u0449\u0438\u0445 \u0438\u0437 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0447\u0430\u0441\u0442\u0435\u0439 (multipart). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 Lua-\u0441\u043a\u0440\u0438\u043f\u0442\u044b \u0432\u044b\u0437\u044b\u0432\u0430\u044e\u0442 \u0444\u0443\u043d\u043a\u0446\u0438\u044e r:parsebody() \u0434\u043b\u044f \u0440\u0430\u0437\u0431\u043e\u0440\u0430 \u0442\u0435\u043b\u0430 \u0437\u0430\u043f\u0440\u043e\u0441\u0430, \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0431\u0443\u0444\u0435\u0440\u0430 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0437\u0430\u043f\u0440\u043e\u0441\u0430. \u0424\u0430\u043a\u0442\u043e\u0432 \u043d\u0430\u043b\u0438\u0447\u0438\u044f [&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-102701","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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