{"id":100585,"date":"2021-06-23T10:22:42","date_gmt":"2021-06-23T08:22:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/oshibka-v-bind-9-16-17-privodyashhaya-k-nevernoj-obrabotke-simvola-w-v-dns-zaprosah"},"modified":"2021-06-23T10:22:42","modified_gmt":"2021-06-23T08:22:42","slug":"oshibka-v-bind-9-16-17-privodyashhaya-k-nevernoj-obrabotke-simvola-w-v-dns-zaprosah","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/oshibka-v-bind-9-16-17-privodyashhaya-k-nevernoj-obrabotke-simvola-w-v-dns-zaprosah","title":{"rendered":"B\u0142\u0105d w BIND 9.16.17, prowadz\u0105cy do niew\u0142a\u015bciwego przetwarzania znaku W w zapytaniach DNS","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Zosta\u0142y opublikowane aktualizacje korekcyjne stabilnej wersji serwera DNS BIND 9.16.18 oraz b\u0119d\u0105cej w fazie rozwoju eksperymentalnej wersji 9.17.15, w kt\u00f3rych usuni\u0119to powa\u017cny b\u0142\u0105d, kt\u00f3ry pojawi\u0142 si\u0119 w wydaniach BIND 9.16.17 i 9.17.14 opublikowanych w zesz\u0142ym tygodniu (dzie\u0144 po tych wydaniach, deweloperzy ostrzegli o problemie i zalecili, aby nie instalowa\u0107 wersji 9.16.17 i 9.17.14). <\/p>\n

W wersjach 9.16.17 i 9.17.14 w tabelach mapowania znak\u00f3w w ma\u0142ych i wielkich literach (maptoupper i maptolower) pomini\u0119to znak \u201ew\u201d, co doprowadzi\u0142o do zamiany znak\u00f3w \u201eW\u201d i \u201ew\u201d w nazwach domen na sekwencj\u0119 \u201e\u201d i zwr\u00f3cenia nieprawid\u0142owego wyniku podczas przetwarzania zapyta\u0144 z mask\u0105. Na przyk\u0142ad, je\u015bli w strefie DNS istnia\u0142 wpis \u201e*.sub.test.local. 1 A 127.0.0.1\u201d, zapytanie o nazw\u0119 \u201eUVW.sub.test.local\u201d prowadzi\u0142o do zwr\u00f3cenia odpowiedzi, w kt\u00f3rej zamiast \u201euvw.sub.test.local\u201d podawano nazw\u0119 \u201euv\/u000.sub.test.local\u201d. <\/p>\n

Ponadto stwierdzono problemy z zamian\u0105 znaku \u201ew\u201d na \u201e\u201d podczas dynamicznej aktualizacji strefy, je\u015bli rejestr znaku \u201ew\u201d w zapytaniu r\u00f3\u017cni\u0142 si\u0119 od rejestru w strefie DNS. Na przyk\u0142ad, je\u015bli w strefie istnia\u0142 wpis \u201eWW.example\u201d, a aktualizacja by\u0142a wysy\u0142ana dla \u201efoo.ww.example.\u201d, by\u0142a ona przetwarzana jako \u201efoo..example.\u201d. Problemy z zamian\u0105 znak\u00f3w mog\u0142y r\u00f3wnie\u017c wyst\u0119powa\u0107 podczas wykonywania operacji transferu strefy z serwera DNS pierwotnego na wt\u00f3rny. <\/p>\n

Publikacja aktualizacji 9.16.18 zosta\u0142a op\u00f3\u017aniona z powodu wykrycia jeszcze dw\u00f3ch b\u0142\u0119d\u00f3w, kt\u00f3re pozosta\u0142y nieskorygowane w wersjach 9.16.18 i 9.17.15. B\u0142\u0119dy prowadz\u0105 do wzajemnych blokad podczas inicjalizacji i wyst\u0119puj\u0105 w konfiguracjach, w kt\u00f3rych w dnssec-policy u\u017cywane s\u0105 te same strefy obecne w r\u00f3\u017cnych widokach (view). U\u017cytkownikom z takimi ustawieniami zaleca si\u0119 powr\u00f3t do wersji BIND 9.16.16.
\n
\u0179r\u00f3d\u0142o: 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 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 DNS-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 BIND 9.16.18 \u0438 \u043d\u0430\u0445\u043e\u0434\u044f\u0449\u0435\u0439\u0441\u044f \u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 9.17.15, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0441\u0435\u0440\u044c\u0451\u0437\u043d\u0430\u044f \u043e\u0448\u0438\u0431\u043a\u0430, \u043f\u043e\u044f\u0432\u0438\u0432\u0448\u0430\u044f\u0441\u044f \u0432 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 BIND 9.16.17 \u0438 9.17.14, \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u043f\u0440\u043e\u0448\u043b\u043e\u0439 \u043d\u0435\u0434\u0435\u043b\u0435 (\u043d\u0430 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u0434\u0435\u043d\u044c \u043f\u043e\u0441\u043b\u0435 \u0434\u0430\u043d\u043d\u044b\u0445 \u0440\u0435\u043b\u0438\u0437\u043e\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u0440\u0435\u0434\u0443\u043f\u0440\u0435\u0434\u0438\u043b\u0438 \u043e \u043d\u0430\u043b\u0438\u0447\u0438\u0438 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0438 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u043e\u0432\u0430\u043b\u0438 \u043d\u0435 \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0442\u044c \u0432\u0435\u0440\u0441\u0438\u0438 9.16.17 \u0438 9.17.14). \u0412 \u0432\u0435\u0440\u0441\u0438\u044f\u0445 9.16.17 \u0438 9.17.14 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