{"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\/ro\/blog\/news\/uyazvimost-v-strongswan-ipsec-privodyashhaya-k-udalyonnomu-vypolneniyu-koda","title":{"rendered":"Vulnerabilitate \u00een strongSwan IPsec care duce la execu\u021bia de cod la distan\u021b\u0103","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u00cen strongSwan, un pachet VPN bazat pe protocolul IPSec folosit \u00een Linux, Android, FreeBSD \u0219i macOS, a fost descoperit\u0103 o vulnerabilitate (CVE-2023-41913) care poate fi exploatat\u0103 pentru a permite execu\u021bia de cod de la distan\u021b\u0103 de c\u0103tre un atacator. Vulnerabilitatea este cauzat\u0103 de o eroare \u00een procesul charon-tkm, care implementeaz\u0103 protocolul de schimb de chei (IKE) bazat pe TKMv2 (Trusted Key Manager), duc\u00e2nd la o dep\u0103\u0219ire a buffer-ului atunci c\u00e2nd se proceseaz\u0103 valori special formate ale schemei DH (Diffie\u2013Hellman). Vulnerabilitatea se manifest\u0103 doar \u00een sistemele care folosesc charon-tkm \u0219i \u00een versiunile strongSwan \u00eencep\u00e2nd cu 5.3.0. Problema a fost remediat\u0103 \u00een actualizarea strongSwan 5.9.12. De asemenea, au fost preg\u0103tite patch-uri pentru a corecta vulnerabilitatea \u00een ramurile \u00eencep\u00e2nd cu 5.3.x. <\/p>\n

Eroarea este cauzat\u0103 de absen\u021ba verific\u0103rii dimensiunii valorilor publice Diffie-Hellman \u00eenainte de a fi copiate \u00eentr-un buffer de dimensiune fix\u0103 \u00een stiv\u0103. Dep\u0103\u0219irea buffer-ului poate fi ini\u021biat\u0103 prin trimiterea unui mesaj IKE_SA_INIT special conceput, care este procesat f\u0103r\u0103 autentificare. \u00cen versiunile anterioare ale strongSwan, verificarea dimensiunii avea loc \u00een handler-ul KE payload (Key Exchange), dar \u00een versiunea 5.3.0 au fost efectuate modific\u0103ri care au mutat verificarea valorilor publice \u00een partea handler-ului protocolului DH (Diffie-Hellman) \u0219i au ad\u0103ugat func\u021bii de tip pentru simplificarea verific\u0103rii corectitudinii grupurilor DH cunoscute. Din neaten\u021bie, noile func\u021bii de verificare au fost omise \u00een procesul charon-tkm, care func\u021bioneaz\u0103 ca un proxy \u00eentre procesul IKE \u0219i TKM (Trusted Key Manager), rezult\u00e2nd \u00een faptul c\u0103 valori necontrolate au ajuns \u00een func\u021bia memcpy(), permi\u021b\u00e2nd scrierea a p\u00e2n\u0103 la 10000 de bytes de date \u00eentr-un buffer de 512 bytes.
\n
Sursa: opennet.ro<\/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\udd47Vulnerabilitate \u00een strongSwan IPsec, care duce la executarea de cod de la distan\u021b\u0103 | ProHoster","description":"\u00cen strongSwan, un pachet VPN bazat pe protocolul IPSec, utilizat \u00een Linux, Android, FreeBSD \u0219i macOS, a fost descoperit\u0103 o vulnerabilitate (CVE-2023-41913), care poate fi utilizat\u0103 pentru executarea de cod de la distan\u021b\u0103 de c\u0103tre un atacator.","canonical_url":"https:\/\/prohoster.info\/ro\/blog\/news\/uyazvimost-v-strongswan-ipsec-privodyashhaya-k-udalyonnomu-vypolneniyu-koda","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"ro_RO","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\/ro\/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\/ro\/wp-json\/wp\/v2\/posts\/111715","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/comments?post=111715"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/posts\/111715\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/media?parent=111715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/categories?post=111715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/ro\/wp-json\/wp\/v2\/tags?post=111715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}