{"id":111715,"date":"2023-11-23T15:10:28","date_gmt":"2023-11-23T13:10:28","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-strongswan-ipsec-privodyashhaya-k-udalyonnomu-vypolneniyu-koda"},"modified":"2023-11-23T15:10:28","modified_gmt":"2023-11-23T13:10:28","slug":"uyazvimost-v-strongswan-ipsec-privodyashhaya-k-udalyonnomu-vypolneniyu-koda","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/uyazvimost-v-strongswan-ipsec-privodyashhaya-k-udalyonnomu-vypolneniyu-koda","title":{"rendered":"Une vuln\u00e9rabilit\u00e9 dans strongSwan IPsec, entra\u00eenant une ex\u00e9cution de code \u00e0 distance.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dans strongSwan, un paquet VPN bas\u00e9 sur le protocole IPSec utilis\u00e9 sur Linux, Android, FreeBSD et macOS, une vuln\u00e9rabilit\u00e9 (CVE-2023-41913) a \u00e9t\u00e9 identifi\u00e9e, permettant l'ex\u00e9cution de code \u00e0 distance par un attaquant. Cette vuln\u00e9rabilit\u00e9 est due \u00e0 une erreur dans le processus charon-tkm avec la mise en \u0153uvre du protocole d'\u00e9change de cl\u00e9s (IKE) bas\u00e9 sur TKMv2 (Trusted Key Manager), entra\u00eenant un d\u00e9bordement de tampon lors du traitement de valeurs de sch\u00e9ma DH (Diffie-Hellman) sp\u00e9cialement con\u00e7ues. La vuln\u00e9rabilit\u00e9 ne se manifeste que dans les syst\u00e8mes utilisant charon-tkm et dans les versions de strongSwan \u00e0 partir de 5.3.0. Le probl\u00e8me a \u00e9t\u00e9 r\u00e9solu dans la mise \u00e0 jour strongSwan 5.9.12. Des correctifs ont \u00e9galement \u00e9t\u00e9 pr\u00e9par\u00e9s pour corriger la vuln\u00e9rabilit\u00e9 dans les branches \u00e0 partir de 5.3.x. <\/p>\n

L'erreur est due \u00e0 l'absence de v\u00e9rification de la taille des valeurs publiques Diffie-Hellman avant leur copie dans un tampon de taille fixe sur la pile. Le d\u00e9bordement peut \u00eatre d\u00e9clench\u00e9 en envoyant un message IKE_SA_INIT sp\u00e9cialement form\u00e9, trait\u00e9 sans authentification. Dans les anciennes versions de strongSwan, la v\u00e9rification de la taille \u00e9tait effectu\u00e9e dans le gestionnaire KE payload (Key Exchange), mais dans la version 5.3.0, des modifications ont \u00e9t\u00e9 apport\u00e9es, d\u00e9pla\u00e7ant la v\u00e9rification des valeurs publiques du c\u00f4t\u00e9 du gestionnaire du protocole DH (Diffie-Hellman) et ajoutant des fonctions standard pour faciliter la v\u00e9rification de l'exactitude des groupes DH connus. Par inadvertance, les nouvelles fonctions de v\u00e9rification ont \u00e9t\u00e9 omises dans le processus charon-tkm, qui fonctionne comme un proxy entre le processus IKE et TKM (Trusted Key Manager), ce qui a abouti \u00e0 des valeurs non v\u00e9rifi\u00e9es dans la fonction memcpy(), permettant d'\u00e9crire jusqu'\u00e0 10 000 octets de donn\u00e9es dans un tampon de 512 octets.
\n
Source : opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 strongSwan, VPN-\u043f\u0430\u043a\u0435\u0442\u0435 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 IPSec, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c \u0432 Linux, Android, FreeBSD \u0438 macOS, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2023-41913), \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0430. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 charon-tkm \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 \u043e\u0431\u043c\u0435\u043d\u0430 \u043a\u043b\u044e\u0447\u0430\u043c\u0438 (IKE) \u043d\u0430 \u0431\u0430\u0437\u0435 TKMv2 (Trusted Key Manager), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0431\u0443\u0444\u0435\u0440\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 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0439 \u0441\u0445\u0435\u043c\u044b DH (Diffie–Hellman). […]<\/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-111715","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\udd47Vuln\u00e9rabilit\u00e9 dans strongSwan IPsec entra\u00eenant une ex\u00e9cution de code \u00e0 distance | ProHoster","description":"Une vuln\u00e9rabilit\u00e9 (CVE-2023-41913) a \u00e9t\u00e9 identifi\u00e9e dans strongSwan, un paquet VPN bas\u00e9 sur le protocole IPSec utilis\u00e9 sur Linux, Android, FreeBSD et macOS, qui peut \u00eatre exploit\u00e9e pour ex\u00e9cuter du code \u00e0 distance par un attaquant.","canonical_url":"https:\/\/prohoster.info\/fr\/blog\/news\/uyazvimost-v-strongswan-ipsec-privodyashhaya-k-udalyonnomu-vypolneniyu-koda","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"fr_FR","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\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 strongSwan IPsec, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u043c\u0443 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430 | ProHoster","og:description":"\u0412 strongSwan, VPN-\u043f\u0430\u043a\u0435\u0442\u0435 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 IPSec, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u043c \u0432 Linux, Android, FreeBSD \u0438 macOS, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2023-41913), \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0430.","og:url":"https:\/\/prohoster.info\/fr\/blog\/news\/uyazvimost-v-strongswan-ipsec-privodyashhaya-k-udalyonnomu-vypolneniyu-koda","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2023-11-23T13:10:28+00:00","article:modified_time":"2023-11-23T13:10:28+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/posts\/111715","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/comments?post=111715"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/posts\/111715\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/media?parent=111715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/categories?post=111715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/tags?post=111715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}