{"id":115207,"date":"2024-04-21T02:30:03","date_gmt":"2024-04-21T00:30:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-glibc-ekspluatiruemaya-cherez-skripty-na-php"},"modified":"2024-04-21T02:30:03","modified_gmt":"2024-04-21T00:30:03","slug":"uyazvimost-v-glibc-ekspluatiruemaya-cherez-skripty-na-php","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimost-v-glibc-ekspluatiruemaya-cherez-skripty-na-php","title":{"rendered":"Glibc haavatavus, mida ekspluateeritakse PHP skriptide kaudu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Glibi standardse C-i teegraafis avastati turvavigastus (CVE-2024-2961), mis p\u00f5hjustab bufferi \u00fclet\u00e4itumise, kui iconv() funktsioon konverteerib spetsiaalselt vormindatud ISO-2022-CN-EXT kodeeringus stringe. Probleemi avastanud teadlane plaanib esitleda 10. mail konverentsil OffensiveCon ettekannet, mille eelteates mainitakse haavatavuse v\u00f5imalikku \u00e4rakasutamist PHP keeltes rakenduste kaudu. Probleem puudutab kogu PHP \u00f6kos\u00fcsteemi ning m\u00f5ningaid rakendusi. <\/p>\n

UCS4-kooditena stringide t\u00f6\u00f6tlemisel lisab raamatukogu vastavalt RFC 1922 n\u00f5uetele m\u00f5ned escape-s\u00fcmbolid, mis m\u00e4rkivad stringi osi, kus kodeering on muutunud. Haavatavus tuleneb ikoonv() funktsiooni eba\u00f5igest sisendite piiride kontrollimisest, mis v\u00f5ib p\u00f5hjustada puhver\u00fclekande maksimum 4 bitti v\u00f5rra. Puudujate piiri \u00fcletamisel v\u00f5ivad olla kirjutatud teatud fikseeritud v\u00e4\u00e4rtused, n\u00e4iteks ‘$+I’, ‘$+J’, ‘$+K’, ‘$+L’, ‘$+M’ ja ‘$*H’. Kuigi sellise haavatavuse kuritarvitamine koodi t\u00e4itmiseks tundub ebat\u00f5en\u00e4oline, on probleemide avastamisega tegelevate teadlaste v\u00e4itel selle p\u00f5hjal saanud luua mitu protot\u00fc\u00fcpi eksploitide jaoks PHP-rakenduste kaugkaaperdamise r\u00fcnnaku l\u00e4biviimiseks, mis viib koodi t\u00e4itmiseni. <\/p>\n

Haavatavus on ilmnenud alates 2000. aastast ja on k\u00f5rvaldatud arenduses oleva Glibc 2.40 haru kaudu. Parandus on saadaval ka Glibc v\u00e4ljaannete patch\u2019ide kujul alates 2.32 kuni 2.39. Distrotides saab haavatavuse parandamise j\u00e4lgida lehtedelt: Debian, Ubuntu, Gentoo, RHEL, SUSE, Fedora, Arch.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0439 \u0421\u0438-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 Glibc \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-2961), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0431\u0443\u0444\u0435\u0440\u0430 \u043f\u0440\u0438 \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0441\u0442\u0440\u043e\u043a \u0432 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u043a\u0435 ISO-2022-CN-EXT \u0444\u0443\u043d\u043a\u0446\u0438\u0435\u0439 iconv(). \u0412\u044b\u044f\u0432\u0438\u0432\u0448\u0438\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043f\u043b\u0430\u043d\u0438\u0440\u0443\u0435\u0442 10 \u043c\u0430\u044f \u0432\u044b\u0441\u0442\u0443\u043f\u0438\u0442\u044c \u043d\u0430 \u043a\u043e\u043d\u0444\u0435\u0440\u0435\u043d\u0446\u0438\u0438 OffensiveCon \u0441 \u0434\u043e\u043a\u043b\u0430\u0434\u043e\u043c, \u0432 \u0430\u043d\u043e\u043d\u0441\u0435 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0443\u043f\u043e\u043c\u0438\u043d\u0430\u0435\u0442\u0441\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0447\u0435\u0440\u0435\u0437 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 PHP. \u0417\u0430\u044f\u0432\u043b\u0435\u043d\u043e, \u0447\u0442\u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u0432\u0441\u044e \u044d\u043a\u043e\u0441\u0438\u0441\u0442\u0435\u043c\u0443 PHP \u0438 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f. […]<\/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-115207","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\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\n","aioseo_head_json":{"title":"\ud83e\udd47Glibc vulnerability exploited through PHP scripts | ProHoster","description":"Glibc standard C library has a vulnerability (CVE-2024-2961) that leads to a buffer overflow when converting specially formatted strings in ISO-2022-CN-EXT encoding using the iconv() function. The researcher who identified the issue plans to present at the OffensiveCon conference on May 10, where the announcement mentions the possibility of exploiting the vulnerability through PHP applications. 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