{"id":121941,"date":"2025-02-14T20:22:09","date_gmt":"2025-02-14T18:22:09","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-musl-ekspluatiruemaya-pri-perekodirovanii-teksta-v-kodirovke-euc-kr"},"modified":"2025-02-14T20:22:09","modified_gmt":"2025-02-14T18:22:09","slug":"uyazvimost-v-musl-ekspluatiruemaya-pri-perekodirovanii-teksta-v-kodirovke-euc-kr","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimost-v-musl-ekspluatiruemaya-pri-perekodirovanii-teksta-v-kodirovke-euc-kr","title":{"rendered":"Muslis on haavatavust, mis kasutatakse teksti \u00fcmberkodeerimisel EUC-KR kodeeringus.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Standardse Musli teegis on avastatud haavatavus (CVE-2024-2961), mis p\u00f5hjustab puhver\u00fcletuse, kui spetsiaalselt vormindatud teksti muudetakse EUC-KR koodimisest UTF-8 koodimisse funktsiooni iconv() abil. Haavatavus ilmneb alates versioonist musl 0.9.13 ja see parandatakse valmivas v\u00e4ljaandes 1.2.6 (enne uuenduse avaldamist tuleks kasutada plaastrit). Haavatavus tuvastati raamatukogu libxml2 kaasasoleva fuzzing-testimise k\u00e4igus. <\/p>\n

Haavatavus v\u00f5ib olla loodud rakenduste r\u00fcndamiseks, mis on loodud Musl teegi abil ja mis teevad tekstide koderdust v\u00e4listest allikatest saadud andmetele. Haavatavuse \u00e4rakasutamine on v\u00f5imalik, kui rakenduses kutsutakse \u00fcles funktsiooni iconv_open(), m\u00e4\u00e4rates l\u00e4hte kodeeringuks EUC-KR ja sihtkodeeringuks UTF-8. Potentsiaalselt haavatavate rakenduste n\u00e4idetena tuuakse esile programmid, mis teevad XML-i, HTML-i ja e-kirjade kodeerimist, p\u00f5hinedes kodeeringule, mis on m\u00e4\u00e4ratud MIME-t\u00fc\u00fcbi p\u00e4ises (n\u00e4iteks «text\/plain; charset=EUC-KR»). N\u00e4iteks teevad sellist kodeerimist programmid, mis kasutavad teeki libxml2. <\/p>\n

Haavatavus tuleneb kahest veast. Esimene viga on seotud piisava kontrolli puudumisega vigaste mitme baitide j\u00e4rjestuste suhtes EUC-KR dekooderites. Teine viga esineb UTF-8 kodeerijas, mis ei olnud ette n\u00e4htud selleks, et sisendi dekooder v\u00f5iks tagastada kehtetuks j\u00e4\u00e4vaid Unicode skalaare. Selle tulemusena toob j\u00e4rjestuste t\u00f6\u00f6tlemine kujul «\xc8\x41» kaasa v\u00e4\u00e4rtuste kirjutamise eraldatud m\u00e4lupiiri v\u00e4lisse alasse.
\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 Musl \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\u043e\u0433\u043e \u0442\u0435\u043a\u0441\u0442\u0430 \u0438\u0437 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u043a\u0438 EUC-KR \u0432 UTF-8 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 iconv(). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u0435\u0440\u0441\u0438\u0438 musl 0.9.13 \u0438 \u0431\u0443\u0434\u0435\u0442 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0430 \u0432 \u0433\u043e\u0442\u043e\u0432\u044f\u0449\u0435\u043c\u0441\u044f \u043a \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u0443\u0441\u043a\u0435 1.2.6 (\u0434\u043e \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u043f\u0430\u0442\u0447). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u044e\u0449\u0438\u043c \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0443 libxml2 \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 fuzzing-\u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f. 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