V plugin\u011b NetworkManager-libreswan, kter\u00fd p\u0159id\u00e1v\u00e1 do NetworkManager funk\u010dnost pro p\u0159ipojen\u00ed k VPN kompatibiln\u00edm se servery zalo\u017een\u00fdmi na Libreswan a Cisco IPsec, byla odhalena zranitelnost (CVE-2024-9050), kter\u00e1 m\u016f\u017ee b\u00fdt zneu\u017eita pro zv\u00fd\u0161en\u00ed pr\u00e1v lok\u00e1ln\u00edm u\u017eivatelem. Zranitelnost byla odstran\u011bna v aktualizaci NetworkManager-libreswan 1.2.24. Sledovat dostupnost aktualizac\u00ed v distribuc\u00edch lze na n\u00e1sleduj\u00edc\u00edch str\u00e1nk\u00e1ch: Debian, Ubuntu, RHEL, SUSE\/openSUSE, Fedora. <\/p>\n
Probl\u00e9m je zp\u016fsoben nespr\u00e1vnou kontrolou konfigurace VPN<\/a>, definovan\u00fdm lok\u00e1ln\u00edm nep\u0159ivilegovan\u00fdm u\u017eivatelem a p\u0159ed\u00e1van\u00fdm p\u0159\u00edmo do Libreswan p\u0159i pokusu o aktivaci spojen\u00ed. Zejm\u00e9na v z\u00e1suvn\u00e9m modulu nebyla provedena kontrola pou\u017eit\u00ed escape znak\u016f, jako je p\u0159enos \u0159\u00e1dku «\n», kter\u00e9 mohly b\u00fdt pou\u017eity k odd\u011blen\u00ed jednotliv\u00fdch nastaven\u00ed uveden\u00fdch v jednom \u0159\u00e1dku. <\/p>\n \u00dato\u010dn\u00edk tedy mohl uv\u00e9st jako jeden z povolen\u00fdch parametr\u016f parametr «leftupdown», zak\u00e1zan\u00fd pro nep\u0159ivilegovan\u00e9 u\u017eivatele, a definovat skript, kter\u00fd se spou\u0161t\u00ed s opr\u00e1vn\u011bn\u00edmi root b\u011bhem procesu vytv\u00e1\u0159en\u00ed spojen\u00ed. Nap\u0159\u00edklad, pro spu\u0161t\u011bn\u00ed programu \/bin\/true lze k povolen\u00e9mu parametru «hostaddrfamily» p\u0159ipojit n\u00e1sleduj\u00edc\u00ed nastaven\u00ed: hostaddrfamily=ipv4\n leftupdown=\/bin\/true\n ikev2=never\n leftxauthclient=yes\n leftusername=username\n phase2alg=aes256-sha1\n authby=secret\n left=faultroute\n leftmodecfgclient=yes\n right=172.31.79.2\nconn ign <\/p>\n Dal\u0161\u00ed zranitelnost byla zji\u0161t\u011bna v pozad\u00ed b\u011b\u017e\u00edc\u00edm procesu guix-daemon, kter\u00fd se pou\u017e\u00edv\u00e1 v distribuc\u00edch zalo\u017een\u00fdch na spr\u00e1vci bal\u00ed\u010dk\u016f GNU Guix. Zranitelnost p\u0159edstavuje nebezpe\u010d\u00ed pro v\u00edc u\u017eivatelsk\u00e9 syst\u00e9my a umo\u017e\u0148uje lok\u00e1ln\u00edmu u\u017eivateli z\u00edskat pr\u00e1va jak\u00e9hokoli u\u017eivatele, kter\u00fd prov\u00e1d\u00ed sestaven\u00ed bal\u00ed\u010dk\u016f (build user), a prov\u00e9st zm\u011bny ve v\u00fdsledku sestaven\u00ed. Podstata zranitelnosti spo\u010d\u00edv\u00e1 v tom, \u017ee \u00fato\u010dn\u00edk m\u016f\u017ee spustit odvozen\u00e9 sestaven\u00ed a pokud bude proces sestaven\u00ed p\u0159eru\u0161en, ji\u017e vytvo\u0159en\u00e9 suid soubory z\u016fstanou p\u0159\u00edstupn\u00e9 ostatn\u00edm u\u017eivatel\u016fm syst\u00e9mu. Pot\u00e9 m\u016f\u017ee \u00fato\u010dn\u00edk vyu\u017e\u00edt vytvo\u0159en\u00fd suid soubor k pozastaven\u00ed procesu sestaven\u00ed, otev\u0159en\u00ed jak\u00e9hokoli souboru p\u0159es \\\/proc\\\/$PID\\\/fd s pr\u00e1vy u\u017eivatele prov\u00e1d\u011bj\u00edc\u00edho sestaven\u00ed a p\u0159epsat soubory s v\u00fdsledky sestaven\u00ed). \u0412 \u043f\u043b\u0430\u0433\u0438\u043d\u0435 NetworkManager-libreswan, \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u043c \u0432 NetworkManager \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0434\u043b\u044f \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u043a VPN, \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u044b\u043c \u0441 \u0441\u0435\u0440\u0432\u0435\u0440\u0430\u043c\u0438 \u043d\u0430 \u0431\u0430\u0437\u0435 Libreswan \u0438 Cisco IPsec, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-9050), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044f \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u044b\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c \u0441\u0432\u043e\u0438\u0445 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0439. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0438 NetworkManager-libreswan 1.2.24. \u041f\u0440\u043e\u0441\u043b\u0435\u0434\u0438\u0442\u044c \u0437\u0430 \u043f\u043e\u044f\u0432\u043b\u0435\u043d\u0438\u0435\u043c \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0432 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445 \u043c\u043e\u0436\u043d\u043e \u043d\u0430 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0445 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0430\u0445: Debian, Ubuntu, RHEL, SUSE\/openSUSE, Fedora. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0432\u044b\u0437\u0432\u0430\u043d\u0430 […]<\/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-120285","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\udd47Zranitelnost v NetworkManager-libreswan a guix-daemon, 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Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"