{"id":102629,"date":"2021-12-16T03:36:46","date_gmt":"2021-12-16T01:36:46","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/perepolnenie-bufera-v-toxcore-ekspluatiruemoe-cherez-otpravku-udp-paketa"},"modified":"2021-12-16T03:36:46","modified_gmt":"2021-12-16T01:36:46","slug":"perepolnenie-bufera-v-toxcore-ekspluatiruemoe-cherez-otpravku-udp-paketa","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/perepolnenie-bufera-v-toxcore-ekspluatiruemoe-cherez-otpravku-udp-paketa","title":{"rendered":"Buffer overflow in Toxcore exploited via UDP packet sending","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>In Toxcore, the reference implementation of the P2P messaging protocol Tox, a vulnerability (CVE-2021-44847) has been identified, which potentially allows for code execution through specially crafted UDP packets. All users of applications based on Toxcore that do not disable UDP transport are vulnerable. For an attack, it is enough to send a UDP packet knowing the victim's IP address, network port, and public DHT key (this information is publicly available in DHT, meaning the attack could be directed at any user or DHT node).     <\/p>\n<p>The issue was present in toxcore releases from 0.1.9 to 0.2.12 and has been fixed in version 0.2.13. As of now, only the qTox project has released an update to address the vulnerability for client applications. As a workaround for protection, UDP can be disabled while keeping TCP support.        <\/p>\n<p>\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435\u043c \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 handle_request(), \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u044e\u0449\u0435\u0433\u043e \u0438\u0437-\u0437\u0430 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0433\u043e \u0440\u0430\u0441\u0447\u0451\u0442\u0430 \u0440\u0430\u0437\u043c\u0435\u0440\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u0441\u0435\u0442\u0435\u0432\u043e\u043c \u043f\u0430\u043a\u0435\u0442\u0435. \u0412 \u0447\u0430\u0441\u0442\u043d\u043e\u0441\u0442\u0438, \u0434\u043b\u0438\u043d\u0430 \u0437\u0430\u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u043b\u0430\u0441\u044c \u0432 \u043c\u0430\u043a\u0440\u043e\u0441\u0435 CRYPTO_SIZE, \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u043c \u043a\u0430\u043a &#171;1 + CRYPTO_PUBLIC_KEY_SIZE * 2 + CRYPTO_NONCE_SIZE&#187;, \u043a\u043e\u0442\u043e\u0440\u044b\u0439  \u0432 \u0434\u0430\u043b\u044c\u043d\u0435\u0439\u0448\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0441\u044f \u0432 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u0432\u044b\u0447\u0438\u0442\u0430\u043d\u0438\u044f &#171;length &#8212; CRYPTO_SIZE&#187;. \u0418\u0437-\u0437\u0430 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u044f \u0441\u043a\u043e\u0431\u043e\u043a \u0432 \u043c\u0430\u043a\u0440\u043e\u0441\u0435 \u0432\u043c\u0435\u0441\u0442\u043e \u0432\u044b\u0447\u0438\u0442\u0430\u043d\u0438\u044f \u0441\u0443\u043c\u043c\u044b \u0432\u0441\u0435\u0445 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0439 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u043b\u043e\u0441\u044c \u0432\u044b\u0447\u0438\u0442\u0430\u043d\u0438\u0435 1 \u0438 \u0441\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u043e\u0441\u0442\u0430\u043b\u044c\u043d\u044b\u0445 \u0447\u0430\u0441\u0442\u0435\u0439. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0432\u043c\u0435\u0441\u0442\u043e  &#171;length &#8212; (1 + 32 * 2 + 24)&#187; \u0440\u0430\u0437\u043c\u0435\u0440 \u0431\u0443\u0444\u0435\u0440\u0430 \u0440\u0430\u0441\u0441\u0447\u0438\u0442\u044b\u0432\u0430\u043b\u0441\u044f \u043a\u0430\u043a &#171;length &#8212; 1 + 32 * 2 + 24&#187;, \u0447\u0442\u043e \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u043b\u043e \u043a \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0432 \u0441\u0442\u0435\u043a\u0435, \u043d\u0430\u0445\u043e\u0434\u044f\u0449\u0438\u0445\u0441\u044f \u0437\u0430 \u0433\u0440\u0430\u043d\u0438\u0446\u0435\u0439 \u0431\u0443\u0444\u0435\u0440\u0430.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56354\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 Toxcore, \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 P2P-\u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 \u043e\u0431\u043c\u0435\u043d\u0430 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f\u043c\u0438 Tox, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-44847), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0438\u043d\u0438\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \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\u043e\u0433\u043e UDP-\u043f\u0430\u043a\u0435\u0442\u0430. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u044b \u0432\u0441\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 Toxcore, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043d\u0435 \u043e\u0442\u043a\u043b\u044e\u0447\u0451\u043d \u0442\u0440\u0430\u043d\u0441\u043f\u043e\u0440\u0442 UDP. \u0414\u043b\u044f \u0430\u0442\u0430\u043a\u0438 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043e\u0442\u043f\u0440\u0430\u0432\u0438\u0442\u044c UDP-\u043f\u0430\u043a\u0435\u0442, \u0437\u043d\u0430\u044f IP-\u0430\u0434\u0440\u0435\u0441, \u0441\u0435\u0442\u0435\u0432\u043e\u0439 \u043f\u043e\u0440\u0442 \u0438 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0439 DHT-\u043a\u043b\u044e\u0447 \u0436\u0435\u0440\u0442\u0432\u044b (\u0434\u0430\u043d\u043d\u044b\u0435 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b \u043f\u0443\u0431\u043b\u0438\u0447\u043d\u043e \u0432 DHT, [&hellip;]<\/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-102629","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412 Toxcore, \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 P2P-\u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 \u043e\u0431\u043c\u0435\u043d\u0430 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f\u043c\u0438 Tox, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-44847), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0438\u043d\u0438\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \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\u043e\u0433\u043e UDP-\u043f\u0430\u043a\u0435\u0442\u0430. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u044b \u0432\u0441\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 Toxcore, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043d\u0435 \u043e\u0442\u043a\u043b\u044e\u0447\u0451\u043d \u0442\u0440\u0430\u043d\u0441\u043f\u043e\u0440\u0442 UDP. \u0414\u043b\u044f \u0430\u0442\u0430\u043a\u0438 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043e\u0442\u043f\u0440\u0430\u0432\u0438\u0442\u044c UDP-\u043f\u0430\u043a\u0435\u0442, \u0437\u043d\u0430\u044f IP-\u0430\u0434\u0440\u0435\u0441, \u0441\u0435\u0442\u0435\u0432\u043e\u0439 \u043f\u043e\u0440\u0442 \u0438 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0439 DHT-\u043a\u043b\u044e\u0447 \u0436\u0435\u0440\u0442\u0432\u044b (\u0434\u0430\u043d\u043d\u044b\u0435 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b \u043f\u0443\u0431\u043b\u0438\u0447\u043d\u043e \u0432 DHT,\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/perepolnenie-bufera-v-toxcore-ekspluatiruemoe-cherez-otpravku-udp-paketa\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"it_IT\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u041f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 Toxcore, \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u043c\u043e\u0435 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 UDP-\u043f\u0430\u043a\u0435\u0442\u0430 | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u0412 Toxcore, \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 P2P-\u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 \u043e\u0431\u043c\u0435\u043d\u0430 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f\u043c\u0438 Tox, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-44847), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0438\u043d\u0438\u0446\u0438\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \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\u043e\u0433\u043e UDP-\u043f\u0430\u043a\u0435\u0442\u0430. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u044b \u0432\u0441\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 Toxcore, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043d\u0435 \u043e\u0442\u043a\u043b\u044e\u0447\u0451\u043d \u0442\u0440\u0430\u043d\u0441\u043f\u043e\u0440\u0442 UDP. \u0414\u043b\u044f \u0430\u0442\u0430\u043a\u0438 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043e\u0442\u043f\u0440\u0430\u0432\u0438\u0442\u044c UDP-\u043f\u0430\u043a\u0435\u0442, \u0437\u043d\u0430\u044f IP-\u0430\u0434\u0440\u0435\u0441, \u0441\u0435\u0442\u0435\u0432\u043e\u0439 \u043f\u043e\u0440\u0442 \u0438 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u0439 DHT-\u043a\u043b\u044e\u0447 \u0436\u0435\u0440\u0442\u0432\u044b (\u0434\u0430\u043d\u043d\u044b\u0435 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b \u043f\u0443\u0431\u043b\u0438\u0447\u043d\u043e \u0432 DHT,\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/perepolnenie-bufera-v-toxcore-ekspluatiruemoe-cherez-otpravku-udp-paketa\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2021-12-16T01:36:46+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2021-12-16T01:36:46+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Overflow del buffer in Toxcore, sfruttato tramite l'invio di pacchetti UDP | ProHoster","description":"In Toxcore, l'implementazione di riferimento del protocollo di messaggistica P2P Tox, \u00e8 stata identificata una vulnerabilit\u00e0 (CVE-2021-44847) che potrebbe consentire l'esecuzione di codice durante la gestione di un pacchetto UDP appositamente formattato. Sono vulnerabili tutti gli utenti delle applicazioni basate su Toxcore in cui non \u00e8 stato disabilitato il trasporto UDP. Per portare a termine un attacco \u00e8 sufficiente inviare un pacchetto UDP, conoscendo l'indirizzo IP, la porta di rete e la chiave DHT aperta della vittima (queste informazioni sono disponibili pubblicamente nel DHT.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/perepolnenie-bufera-v-toxcore-ekspluatiruemoe-cherez-otpravku-udp-paketa","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 Toxcore, 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\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\u043e\u0433\u043e UDP-\u043f\u0430\u043a\u0435\u0442\u0430. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u044b \u0432\u0441\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 Toxcore, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043d\u0435 \u043e\u0442\u043a\u043b\u044e\u0447\u0451\u043d \u0442\u0440\u0430\u043d\u0441\u043f\u043e\u0440\u0442 UDP. \u0414\u043b\u044f \u0430\u0442\u0430\u043a\u0438 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043e\u0442\u043f\u0440\u0430\u0432\u0438\u0442\u044c UDP-\u043f\u0430\u043a\u0435\u0442, \u0437\u043d\u0430\u044f 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