{"id":102799,"date":"2021-12-29T09:36:48","date_gmt":"2021-12-29T07:36:48","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/%d0%be%d0%b1%d0%bd%d0%be%d0%b2%d0%bb%d0%b5%d0%bd%d0%b8%d0%b5-log4j-2-17-1-%d1%81-%d1%83%d1%81%d1%82%d1%80%d0%b0%d0%bd%d0%b5%d0%bd%d0%b8%d0%b5%d0%bc-%d0%b5%d1%89%d1%91-%d0%be%d0%b4%d0%bd%d0%be%d0%b9"},"modified":"2021-12-29T09:36:48","modified_gmt":"2021-12-29T07:36:48","slug":"%d0%be%d0%b1%d0%bd%d0%be%d0%b2%d0%bb%d0%b5%d0%bd%d0%b8%d0%b5-log4j-2-17-1-%d1%81-%d1%83%d1%81%d1%82%d1%80%d0%b0%d0%bd%d0%b5%d0%bd%d0%b8%d0%b5%d0%bc-%d0%b5%d1%89%d1%91-%d0%be%d0%b4%d0%bd%d0%be%d0%b9","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/%d0%be%d0%b1%d0%bd%d0%be%d0%b2%d0%bb%d0%b5%d0%bd%d0%b8%d0%b5-log4j-2-17-1-%d1%81-%d1%83%d1%81%d1%82%d1%80%d0%b0%d0%bd%d0%b5%d0%bd%d0%b8%d0%b5%d0%bc-%d0%b5%d1%89%d1%91-%d0%be%d0%b4%d0%bd%d0%be%d0%b9","title":{"rendered":"Aktualizace Log4j 2.17.1 s odstran\u011bn\u00edm dal\u0161\u00ed zranitelnosti","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Byly vyd\u00e1ny opravy knihovny Log4j 2.17.1, 2.3.2-rc1 a 2.12.4-rc1, kter\u00e9 opravuj\u00ed dal\u0161\u00ed zranitelnost (CVE-2021-44832). Uv\u00e1d\u00ed se, \u017ee probl\u00e9m umo\u017e\u0148uje vzd\u00e1len\u00e9 vykon\u00e1v\u00e1n\u00ed k\u00f3du (RCE), av\u0161ak je ozna\u010den jako n\u00edzkorisikov\u00fd (CVSS Score 6.6) a p\u0159edstavuje sp\u00ed\u0161e teoretick\u00fd probl\u00e9m, proto\u017ee vy\u017eaduje specifick\u00e9 podm\u00ednky pro zneu\u017eit\u00ed \u2014 \u00fato\u010dn\u00edk by m\u011bl m\u00edt mo\u017enost zm\u011bnit soubor s nastaven\u00edm Log4j, tzn. mus\u00ed m\u00edt p\u0159\u00edstup k napaden\u00e9mu syst\u00e9mu a opr\u00e1vn\u011bn\u00ed k \u00faprav\u011b hodnoty parametru log4j2.configurationFile nebo ke zm\u011bn\u00e1m v existuj\u00edc\u00edch souborech s nastaven\u00edm logov\u00e1n\u00ed. <\/p>\n

\u00datok spo\u010d\u00edv\u00e1 v ur\u010den\u00ed konfigurace na m\u00edstn\u00edm syst\u00e9mu zalo\u017een\u00e9 na JDBC Appender, kter\u00e1 odkazuje na extern\u00ed JNDI URI, p\u0159i jeho\u017e dotazu m\u016f\u017ee b\u00fdt vr\u00e1cena Java t\u0159\u00edda pro vykon\u00e1n\u00ed. Ve v\u00fdchoz\u00edm nastaven\u00ed nen\u00ed JDBC Appender nakonfigurov\u00e1n pro zpracov\u00e1n\u00ed protokol\u016f odli\u0161n\u00fdch od Javy, tzn. bez zm\u011bny konfigurace je \u00fatok nemo\u017en\u00fd. Krom\u011b toho se probl\u00e9m projevuje pouze v JAR souboru log4j-core a net\u00fdk\u00e1 se aplikac\u00ed, kter\u00e9 pou\u017e\u00edvaj\u00ed JAR soubor log4j-api bez log4j-core. \t \u2026
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 Log4j 2.17.1, 2.3.2-rc1 \u0438 2.12.4-rc1, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0435\u0449\u0451 \u043e\u0434\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-44832). \u0423\u043f\u043e\u043c\u0438\u043d\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0435 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a\u043e\u0434\u0430 (RCE), \u043d\u043e \u043f\u0440\u0438 \u044d\u0442\u043e\u043c \u043f\u043e\u043c\u0435\u0447\u0435\u043d\u0430 \u043a\u0430\u043a \u043d\u0435\u043e\u043f\u0430\u0441\u043d\u0430\u044f (CVSS Score 6.6) \u0438 \u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u043c \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u043b\u0438\u0448\u044c \u0442\u0435\u043e\u0440\u0435\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0438\u043d\u0442\u0435\u0440\u0435\u0441, \u0442\u0430\u043a \u043a\u0430\u043a \u0442\u0440\u0435\u0431\u0443\u0435\u0442 \u0441\u043f\u0435\u0446\u0438\u0444\u0438\u0447\u043d\u044b\u0445 \u0443\u0441\u043b\u043e\u0432\u0438\u0439 \u0434\u043b\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 — \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439 \u0434\u043e\u043b\u0436\u0435\u043d \u0438\u043c\u0435\u0442\u044c \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0432\u043d\u0435\u0441\u0442\u0438 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 […]<\/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-102799","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\udd47Aktualizace Log4j 2.17.1 s odstran\u011bn\u00edm dal\u0161\u00ed zranitelnosti | ProHoster","description":"Byly vyd\u00e1ny opravy knihovny Log4j 2.17.1, 2.3.2-rc1 a 2.12.4-rc1, ve kter\u00fdch byla odstran\u011bna dal\u0161\u00ed zranitelnost 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\u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 | ProHoster","og:description":"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 Log4j 2.17.1, 2.3.2-rc1 \u0438 2.12.4-rc1, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0435\u0449\u0451 \u043e\u0434\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c 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