{"id":123470,"date":"2025-04-11T15:05:06","date_gmt":"2025-04-11T13:05:06","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-setevom-konfiguratore-connman-i-dns-biblioteke-c-ares"},"modified":"2025-04-11T15:05:06","modified_gmt":"2025-04-11T13:05:06","slug":"uyazvimosti-v-setevom-konfiguratore-connman-i-dns-biblioteke-c-ares","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/uyazvimosti-v-setevom-konfiguratore-connman-i-dns-biblioteke-c-ares","title":{"rendered":"Vulnerabilities in the ConnMan network configurator and the c-ares DNS library","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

W konfiguratorze sieci ConnMan, szeroko stosowanym w wbudowanych systemach Linux, platformach motoryzacyjnych i urz\u0105dzeniach Internetu Rzeczy, wykryto podatno\u015b\u0107 (CVE-2025-32743), kt\u00f3ra potencjalnie mo\u017ce prowadzi\u0107 do wykonania kodu podczas przetwarzania specjalnie sformatowanych odpowiedzi z serwera DNS. Problem otrzyma\u0142 krytyczny poziom zagro\u017cenia (9.1 na 10). Podatno\u015b\u0107 wyst\u0119puje a\u017c do aktualnej wersji ConnMan 1.44 i na razie pozostaje nieza\u0142atana. <\/p>\n

Vulnerability exists in the implementation of DNS proxy and is caused by the fact that when processing a DNS response with the TC (Truncated) bit, the 'lookup' string in the ns_resolv function remains empty or has a NULL value. This subsequently leads to a buffer overflow due to incorrect size calculation of the data copied using the memcpy function. <\/p>\n

Dodatkowo mo\u017cna zauwa\u017cy\u0107 podatno\u015b\u0107 (CVE-2025-31498) w bibliotece c-ares, przeznaczonej do wysy\u0142ania zapyta\u0144 DNS w trybie asynchronicznym. Podatno\u015b\u0107 jest spowodowana odwo\u0142aniem do ju\u017c zwolnionego obszaru pami\u0119ci (use-after-free) w funkcji przetwarzania odpowiedzi z serwera DNS. <\/p>\n

Problem wynika z tego, \u017ce w przypadku zerwania po\u0142\u0105czenia mo\u017ce wyst\u0105pi\u0107 sytuacja, w kt\u00f3rej uchwyt po\u0142\u0105czenia zosta\u0142 ju\u017c zwolniony, ale funkcja read_answers() uwa\u017ca, \u017ce jest on nadal dost\u0119pny przy wyj\u0105tkach z kolejki innych zapyta\u0144. Eksploatacja podatno\u015bci jest utrudniona tym, \u017ce atakuj\u0105cy musi kontrolowa\u0107 serwer DNS, przez kt\u00f3ry realizowane jest rozwi\u0105zywanie, i stworzy\u0107 warunki do zako\u0144czenia b\u0142\u0119dami wywo\u0142a\u0144 send()\/write(), co teoretycznie jest mo\u017cliwe poprzez bombardowanie ofiary pakietami ICMP UNREACHABLE. <\/p>\n

Podatno\u015b\u0107 mo\u017ce by\u0107 wykorzystywana do atak\u00f3w na projekty, kt\u00f3re korzystaj\u0105 z biblioteki c-ares. Przyk\u0142adowo, c-ares jest u\u017cywane w Node.js, sssd, apt-cacher-ng, wireshark, pgbouncer, shadowsocks, zephyr, sysdig i frr. Problem wyst\u0119puje od wersji 1.32.3 (lipiec 2024 roku) i zosta\u0142 naprawiony w aktualizacji c-ares 1.34.5. Mo\u017cna \u015bledzi\u0107 usuni\u0119cie podatno\u015bci w dystrybucjach na nast\u0119puj\u0105cych stronach: Debian, Ubuntu, RHEL, SUSE\/openSUSE, Fedora, Arch, FreeBSD.
\n
\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0441\u0435\u0442\u0435\u0432\u043e\u043c \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0442\u043e\u0440\u0435 ConnMan, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0435\u043c \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u0432\u043e \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u044b\u0445 Linux-\u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0430\u0432\u0442\u043e\u043c\u043e\u0431\u0438\u043b\u044c\u043d\u044b\u0445 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0430\u0445 \u0438 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430\u0445 \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442\u0430 \u0432\u0435\u0449\u0435\u0439, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-32743), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u043e\u0442\u0432\u0435\u0442\u043e\u0432 \u043e\u0442 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0435 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (9.1 \u0438\u0437 10). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432\u043f\u043b\u043e\u0442\u044c \u0434\u043e \u0430\u043a\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 ConnMan 1.44 \u0438 \u043f\u043e\u043a\u0430 \u043e\u0441\u0442\u0430\u0451\u0442\u0441\u044f \u043d\u0435\u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0439. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 […]<\/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-123470","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\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\udd47Podatno\u015bci w konfiguratorze sieci ConnMan i bibliotece DNS c-ares | ProHoster","description":"W konfiguratorze sieci ConnMan, szeroko stosowanym w wbudowanych systemach Linux, platformach motoryzacyjnych i urz\u0105dzeniach Internetu Rzeczy, wykryto podatno\u015b\u0107 (CVE-2025-32743), kt\u00f3ra potencjalnie 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