{"id":73151,"date":"2020-03-07T14:42:03","date_gmt":"2020-03-07T11:42:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-pppd-i-lwip-pozvolyayushhaya-udalyonno-vypolnit-kod-s-pravami-root"},"modified":"2020-03-07T14:42:03","modified_gmt":"2020-03-07T11:42:03","slug":"uyazvimost-v-pppd-i-lwip-pozvolyayushhaya-udalyonno-vypolnit-kod-s-pravami-root","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/uyazvimost-v-pppd-i-lwip-pozvolyayushhaya-udalyonno-vypolnit-kod-s-pravami-root","title":{"rendered":"Dob\u00ebsia n\u00eb pppd dhe lwIP, e cila lejon ekzekutimin e kodit nga \u0434\u0438\u0441\u0442\u0430\u043d\u00e7a me t\u00eb drejtat root","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

N\u00eb paket\u00ebn pppd u identifikua<\/a><\/noindex> vulnerabiliteti<\/a><\/noindex> (CVE-2020-8597<\/a><\/noindex>), duke lejuar ekzekutimin e kodit t\u00eb tij p\u00ebrmes d\u00ebrgimit t\u00eb k\u00ebrkesave t\u00eb ve\u00e7anta p\u00ebr autentifikim n\u00eb sistemet q\u00eb p\u00ebrdorin protokollin PPP (Point-to-Point Protocol) ose PPPoE (PPP over Ethernet). K\u00ebta protokolle zakonisht p\u00ebrdoren nga ofruesit p\u00ebr t\u00eb organizuar lidhjen p\u00ebrmes Ethernet ose DSL, si dhe n\u00eb disa VPN (p.sh., pptpd dhe openfortivpn<\/a><\/noindex>). P\u00ebr t\u00eb kontrolluar ekspozimin e sistemeve t\u00eb tyre ndaj k\u00ebsaj \u00e7\u00ebshtjeje \u00ebsht\u00eb p\u00ebrgatitur<\/a><\/noindex> prototipi i eksploitit.<\/p>\n

Vulnerabiliteti shkaktohet nga mbingopja e buffers n\u00eb implementimin e protokollit t\u00eb autentifikimit EAP (Extensible Authentication Protocol). Sulmi mund t\u00eb kryhet n\u00eb faz\u00ebn para kalimit t\u00eb autentifikimit p\u00ebrmes d\u00ebrgimit t\u00eb nj\u00eb pakoje me lloj EAPT_MD5CHAP q\u00eb p\u00ebrmban nj\u00eb em\u00ebr hosti shum\u00eb t\u00eb gjat\u00eb, t\u00eb cilat nuk mund t\u00eb p\u00ebrmbahen n\u00eb bufferin e caktuar. P\u00ebr shkak t\u00eb nj\u00eb gabimi n\u00eb kodin e kontrollit t\u00eb madh\u00ebsis\u00eb s\u00eb fush\u00ebs rhostname, sulmuesi mund t\u00eb mbi-shkruaj\u00eb t\u00eb dh\u00ebnat p\u00ebrtej bufferit n\u00eb stack dhe t\u00eb arrij\u00eb ekzekutimin e kodit t\u00eb tij n\u00eb m\u00ebnyr\u00eb t\u00eb larg\u00ebt me t\u00eb drejta root. Vulnerabiliteti shfaqet nga ana e serverit dhe klientit, pra mund t\u00eb sulmohet jo vet\u00ebm serveri, por edhe klienti q\u00eb p\u00ebrpiqet t\u00eb lidhet me nj\u00eb server t\u00eb kontrolluar nga sulmuesi (p.sh., sulmuesi mund fillimisht t\u00eb hack-oj\u00eb serverin p\u00ebrmes k\u00ebsaj dobie dhe pastaj t\u00eb filloj\u00eb t\u00eb godas\u00eb klient\u00ebt q\u00eb lidhen).<\/p>\n

Problemi preku versionet pppd<\/a><\/noindex> nga 2.4.2 deri n\u00eb 2.4.8 p\u00ebrfshir\u00eb dhe \u00ebsht\u00eb eliminuar n\u00eb form\u00ebn patch<\/a><\/noindex>. Vulnerabiliteti gjithashtu dhe<\/a><\/noindex> staku lwIP<\/a><\/noindex>, por n\u00eb konfigurimin e paracaktuar n\u00eb lwIP mb\u00ebshtetje p\u00ebr EAP nuk \u00ebsht\u00eb e p\u00ebrfshir\u00eb.<\/p>\n

Statusi i eliminimit t\u00eb problemeve n\u00eb distribucione mund t\u00eb shikohet n\u00eb k\u00ebto faqe: Debian<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, RHEL<\/a><\/noindex>, Fedora<\/a><\/noindex>, SUSE<\/a><\/noindex>, OpenWRT<\/a><\/noindex>, Arch<\/a><\/noindex>, NetBSD<\/a><\/noindex>. N\u00eb RHEL, OpenWRT dhe SUSE paketa pppd \u00ebsht\u00eb nd\u00ebrtuar me aktivizimin e mbrojtjes \u00abStack Smashing Protection\u00bb (modi \u00ab-fstack-protector\u00bb n\u00eb gcc), e cila kufizon shfryt\u00ebzimin e d\u00ebshtimeve. P\u00ebrve\u00e7 distribucioneve, kjo cenueshm\u00ebri \u00ebsht\u00eb konfirmuar gjithashtu n\u00eb disa produkte. Cisco<\/a><\/noindex> (CallManager), TP-LINK<\/a><\/noindex> dhe Synology (DiskStation Manager, VisualStation VS960HD dhe Router Manager), t\u00eb cilat p\u00ebrdorin kodin pppd ose lwIP.<\/p>\n

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

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

\u0412 \u043f\u0430\u043a\u0435\u0442\u0435 pppd \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2020-8597), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 \u043a\u043e\u0434 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043d\u0430 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044e \u043a \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u043c, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0449\u0438\u043c \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b PPP (Point-to-Point Protocol) \u0438\u043b\u0438 PPPoE (PPP over Ethernet). \u0414\u0430\u043d\u043d\u044b\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u044b \u043e\u0431\u044b\u0447\u043d\u043e \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u044e\u0442\u0441\u044f \u043f\u0440\u043e\u0432\u0430\u0439\u0434\u0435\u0440\u0430\u043c\u0438 \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0447\u0435\u0440\u0435\u0437 Ethernet \u0438\u043b\u0438 DSL, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442\u0441\u044f \u0432 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 VPN (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, pptpd \u0438 openfortivpn). \u0414\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u043d\u043e\u0441\u0442\u0438 \u0441\u0432\u043e\u0438\u0445 […]<\/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-73151","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\udd47Vulnerabiliteti n\u00eb pppd dhe lwIP, duke lejuar ekzekutimin e kodit n\u00eb m\u00ebnyr\u00eb t\u00eb larg\u00ebt me t\u00eb drejta root | ProHoster","description":"Nj\u00eb vulnerabilitet u zbulua n\u00eb paket\u00ebn 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