{"id":93183,"date":"2020-09-04T07:42:02","date_gmt":"2020-09-04T05:42:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-realizaczii-soketov-af_packet-yadra-linux"},"modified":"2020-09-04T07:42:02","modified_gmt":"2020-09-04T05:42:02","slug":"uyazvimost-v-realizaczii-soketov-af_packet-yadra-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/uyazvimost-v-realizaczii-soketov-af_packet-yadra-linux","title":{"rendered":"K\u00ebrc\u00ebnimi n\u00eb realizimin e soketeve AF_PACKET t\u00eb b\u00ebrtham\u00ebs Linux.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Pas tre vjet\u00ebsh nga vala e dob\u00ebsive (1<\/a><\/noindex>, 2<\/a><\/noindex>, 3<\/a><\/noindex>, 4<\/a><\/noindex>, 5<\/a><\/noindex>) n\u00eb n\u00ebn-sistemin AF_PACKET t\u00eb b\u00ebrtham\u00ebs Linux u identifikua<\/a><\/noindex> ka nj\u00eb problem tjet\u00ebr (CVE-2020-14386<\/a><\/noindex>), q\u00eb lejon nj\u00eb p\u00ebrdorues lokal pa privilegje t\u00eb ekzekutoj\u00eb kod me t\u00eb drejta root ose t\u00eb dal\u00eb nga kontejner\u00ebt e izoluar, n\u00ebse ata kan\u00eb qasje n\u00eb root.<\/p>\n

P\u00ebr t\u00eb krijuar nj\u00eb soket AF_PACKET dhe p\u00ebr t\u00eb shfryt\u00ebzuar dob\u00ebsin\u00eb, k\u00ebrkohet t\u00eb kesh autorizimin CAP_NET_RAW. Megjithat\u00eb, ky autorizim mund t\u00eb merret nga nj\u00eb p\u00ebrdorues pa privilegje n\u00eb kontejner\u00ebt e krijuar n\u00eb sisteme me mb\u00ebshtetje t\u00eb aktivizuar p\u00ebr hap\u00ebsira identiteti (user namespaces). P\u00ebr shembull, hap\u00ebsirat e identitetit jan\u00eb aktivizuar p\u00ebr shkak t\u00eb defektit n\u00eb Ubuntu dhe Fedora, por nuk jan\u00eb aktivizuar n\u00eb Debian dhe RHEL. N\u00eb Android, procesi mediaserver ka t\u00eb drejt\u00ebn t\u00eb krijoj\u00eb sokete AF_PACKET, p\u00ebrmes t\u00eb cilit mund t\u00eb shfryt\u00ebzohet dob\u00ebsia.<\/p>\n

Dob\u00ebsia \u00ebsht\u00eb e pranishme n\u00eb funksionin tpacket_rcv dhe shkaktohet nga nj\u00eb gabim n\u00eb llogaritjen e variabl\u00ebs netoff. Nj\u00eb sulmues mund t\u00eb krijoj\u00eb kushte t\u00eb tilla, sa q\u00eb variabla netoff t\u00eb marr vlera m\u00eb t\u00eb vogla se variabla maclen, e cila do t\u00eb shkaktonte nj\u00eb tejkalim gjat\u00eb llogaritjes «macoff = netoff \u2014 maclen» dhe vendosjen e gabuar t\u00eb treguesit p\u00ebr tamponin e t\u00eb dh\u00ebnave q\u00eb po vijn\u00eb. Si rezultat, sulmuesit mund t'u mund\u00ebsohet t\u00eb shkruajn\u00eb nga 1 deri n\u00eb 10 byte n\u00eb nj\u00eb zon\u00eb jasht\u00eb tamponit t\u00eb alokuar. V\u00ebrehet se \u00ebsht\u00eb duke u zhvilluar nj\u00eb eksploit q\u00eb lejon marrjen e t\u00eb drejtave root n\u00eb sistem. <\/p>\n

Problemi \u00ebsht\u00eb prezent n\u00eb b\u00ebrtham\u00eb q\u00eb nga korriku 2008, dmth. shfaqet n\u00eb t\u00eb gjitha b\u00ebrthamat aktuale. Ndreqja aktualisht \u00ebsht\u00eb n\u00eb dispozicion n\u00eb form\u00ebn e patch<\/a><\/noindex>. Ndjekja e shfaqjes s\u00eb p\u00ebrdit\u00ebsimeve t\u00eb paketave n\u00eb distribucione mund t\u00eb b\u00ebhet n\u00eb k\u00ebto faqe: Ubuntu<\/a><\/noindex>, Fedora<\/a><\/noindex>, SUSE<\/a><\/noindex>, Debian<\/a><\/noindex>, RHEL<\/a><\/noindex>, Arch<\/a><\/noindex>.<\/p>\n

<\/a><\/noindex><\/p>\n

Burimi: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0421\u043f\u0443\u0441\u0442\u044f \u0442\u0440\u0438 \u0433\u043e\u0434\u0430 \u0441 \u043c\u043e\u043c\u0435\u043d\u0442\u0430 \u0432\u043e\u043b\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 (1, 2, 3, 4, 5) \u0432 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 AF_PACKET \u044f\u0434\u0440\u0430 Linux \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0435\u0449\u0451 \u043e\u0434\u043d\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 (CVE-2020-14386), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root \u0438\u043b\u0438 \u0432\u044b\u0439\u0442\u0438 \u0438\u0437 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043e\u0432, \u043f\u0440\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u0438 \u0432 \u043d\u0438\u0445 root-\u0434\u043e\u0441\u0442\u0443\u043f\u0430. \u0414\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0441\u043e\u043a\u0435\u0442\u0430 AF_PACKET \u0438 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u043d\u0430\u043b\u0438\u0447\u0438\u0435 \u043f\u043e\u043b\u043d\u043e\u043c\u043e\u0447\u0438\u0439 CAP_NET_RAW. \u0422\u0435\u043c \u043d\u0435 \u043c\u0435\u043d\u0435\u0435, […]<\/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-93183","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"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\udd47Vulnerabilitet n\u00eb implementimin e soketeve AF_PACKET t\u00eb b\u00ebrtham\u00ebs Linux | ProHoster","description":"Pas tri vjet\u00ebsh nga vala e vulnerabiliteteve (1, 2, 3, 4, 5) n\u00eb n\u00ebn-sistemin AF_PACKET t\u00eb b\u00ebrtham\u00ebs Linux \u00ebsht\u00eb identifikuar nj\u00eb problem tjet\u00ebr (CVE-2020-14386), i cili lejon nj\u00eb p\u00ebrdorues lokal me priviligje t\u00eb ulta t\u00eb ekzekutoj\u00eb kod me t\u00eb drejtat e root-it ose t\u00eb dal\u00eb nga konteineret e izoluar, n\u00ebse ka qasje root aty. P\u00ebr t\u00eb krijuar nj\u00eb socket AF_PACKET dhe p\u00ebr t\u00eb shfryt\u00ebzuar vulnerabilitetin, nevojiten fuqit\u00eb CAP_NET_RAW. Megjithat\u00eb,","canonical_url":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/uyazvimost-v-realizaczii-soketov-af_packet-yadra-linux","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sq_AL","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 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0441\u043e\u043a\u0435\u0442\u043e\u0432 AF_PACKET \u044f\u0434\u0440\u0430 Linux | ProHoster","og:description":"\u0421\u043f\u0443\u0441\u0442\u044f \u0442\u0440\u0438 \u0433\u043e\u0434\u0430 \u0441 \u043c\u043e\u043c\u0435\u043d\u0442\u0430 \u0432\u043e\u043b\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 (1, 2, 3, 4, 5) \u0432 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 AF_PACKET \u044f\u0434\u0440\u0430 Linux \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0435\u0449\u0451 \u043e\u0434\u043d\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 (CVE-2020-14386), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root \u0438\u043b\u0438 \u0432\u044b\u0439\u0442\u0438 \u0438\u0437 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043e\u0432, \u043f\u0440\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u0438 \u0432 \u043d\u0438\u0445 root-\u0434\u043e\u0441\u0442\u0443\u043f\u0430. \u0414\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0441\u043e\u043a\u0435\u0442\u0430 AF_PACKET \u0438 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u043d\u0430\u043b\u0438\u0447\u0438\u0435 \u043f\u043e\u043b\u043d\u043e\u043c\u043e\u0447\u0438\u0439 CAP_NET_RAW. \u0422\u0435\u043c \u043d\u0435 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