{"id":38918,"date":"2019-10-31T22:26:45","date_gmt":"2019-10-31T19:26:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/uyazvimost-v-sudo-pozvolyayushhaya-povysit-privilegii-pri-ispolzovanii-spetsifichnyh-pravil\/"},"modified":"2019-10-31T22:26:45","modified_gmt":"2019-10-31T19:26:45","slug":"uyazvimost-v-sudo-pozvolyayushhaya-povysit-privilegii-pri-ispolzovanii-spetsifichnyh-pravil","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/uyazvimost-v-sudo-pozvolyayushhaya-povysit-privilegii-pri-ispolzovanii-spetsifichnyh-pravil","title":{"rendered":"Nj\u00eb e zakonshme n\u00eb sudo, e cila lejon rritjen e privilegjeve duke p\u00ebrdorur rregulla specifike","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

ISO\/IEC 27001:2013 Sudo<\/a><\/noindex>ISO 9001:2015 u zbulua<\/a><\/noindex> vulnerabiliteti<\/a><\/noindex> (CVE-2019-14287<\/a><\/noindex>), q\u00eb lejon p\u00ebrmbushjen e komandave me t\u00eb drejta root, n\u00ebse n\u00eb cil\u00ebsimet sudoers ekzistojn\u00eb rregulla, n\u00eb t\u00eb cilat n\u00eb seksionin e verifikimit t\u00eb identifikuesit t\u00eb p\u00ebrdoruesit pas fjal\u00ebs ky\u00e7e lejuese \"ALL\" ndodhet nj\u00eb ndalim i qart\u00eb p\u00ebr ekzekutimin me t\u00eb drejta root (\"... (ALL, !root) ...\"). N\u00eb konfigurimet e paracaktuar n\u00eb shp\u00ebrndarjet, vulnerabiliteti nuk shfaqet. <\/p>\n

N\u00ebse n\u00eb sudoers ekzistojn\u00eb rregulla t\u00eb lejuara, por jasht\u00ebzakonisht t\u00eb rralla n\u00eb praktik\u00eb, q\u00eb lejojn\u00eb ekzekutimin e nj\u00eb komande t\u00eb caktuar n\u00ebn identifikuesin e UID t\u00eb \u00e7do p\u00ebrdoruesi, p\u00ebrve\u00e7 root, sulmuesi, i cili ka autorizimin p\u00ebr t\u00eb ekzekutuar k\u00ebt\u00eb komand\u00eb, mund t\u00eb anashkaloj\u00eb kufizimin e vendosur dhe t\u00eb ekzekutoj\u00eb komand\u00ebn me t\u00eb drejta root. P\u00ebr t\u00eb anashkaluar kufizimin, mjafton t\u00eb provoni t\u00eb ekzekutoni komand\u00ebn e caktuar me UID \"-1\" ose \"4294967295\", \u00e7ka do t\u00eb \u00e7oj\u00eb n\u00eb ekzekutimin e saj me UID 0. <\/p>\n

P\u00ebr shembull, n\u00ebse n\u00eb konfigurim ka nj\u00eb rregull q\u00eb i jep \u00e7do p\u00ebrdoruesi t\u00eb drejt\u00ebn p\u00ebr t\u00eb ekzekutuar programin \\\/usr\\bin\\\/id n\u00ebn \u00e7do UID:<\/p>\n

myhost ALL = (ALL, !root) \\\/usr\\bin\\\/id<\/p>\n

ose nj\u00eb variant q\u00eb lejon ekzekutimin vet\u00ebm p\u00ebr p\u00ebrdoruesin e caktuar bob:<\/p>\n

myhost bob = (ALL, !root) \\\/usr\\bin\\\/id<\/p>\n

P\u00ebrdoruesi mund t\u00eb ekzekutoj\u00eb \"sudo -u '#-1' id\" dhe utilitari \/usr\/bin\/id do t\u00eb nis\u00eb me t\u00eb drejta root, pavar\u00ebsisht ndalimit t\u00eb qart\u00eb n\u00eb cil\u00ebsime. Problemi \u00ebsht\u00eb shkaktuar nga nj\u00eb mosv\u00ebmendje p\u00ebr vlerat speciale \"-1\" ose \"4294967295\", t\u00eb cilat nuk \u00e7ojn\u00eb n\u00eb ndryshimin e UID-s\u00eb, por pasi vet\u00eb sudo tashm\u00eb po ekzekutohet n\u00ebn root, pa ndryshimin e UID-s\u00eb, edhe komanda e synuar niset me t\u00eb drejta root. <\/p>\n

N\u00eb shp\u00ebrndarjet SUSE dhe openSUSE pa tregimin n\u00eb rregullin \"NOPASSWD\" vulnerabiliteti nuk \u00ebsht\u00eb e shfryt\u00ebzueshme<\/a><\/noindex>, pasi n\u00eb sudoers si paracaktim \u00ebsht\u00eb aktivizuar regjimi \"Defaults targetpw\" ku kryhet kontrolli i UID mbi baz\u00ebn e fjal\u00ebkalimeve me daljen e nj\u00eb k\u00ebrkese p\u00ebr futur fjal\u00ebkalimin e p\u00ebrdoruesit t\u00eb synuar. P\u00ebr sistemet e tilla, sulmi mund t\u00eb kryhet vet\u00ebm n\u00ebse ekzistojn\u00eb rregulla t\u00eb tipit:<\/p>\n

myhost ALL = (ALL, !root) NOPASSWD: \\\/usr\\bin\\\/id<\/p>\n

Problemi \u00ebsht\u00eb zgjidhur n\u00eb l\u00ebshimin Sudo 1.8.28<\/a><\/noindex>. Rregullimi gjithashtu \u00ebsht\u00eb n\u00eb dispozitjon n\u00eb form\u00ebn patch-it<\/a><\/noindex>. N\u00eb distribuimet, dob\u00ebsia tashm\u00eb \u00ebsht\u00eb zgjidhur n\u00eb Debian<\/a><\/noindex>, Arch Linux<\/a><\/noindex>, SUSE\/openSUSE<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, Gentoo<\/a><\/noindex> dhe FreeBSD<\/a><\/noindex>. N\u00eb momentin e shkruar t\u00eb lajmit, problemi mbetet i pa zgjidhur n\u00eb RHEL<\/a><\/noindex> dhe Fedora<\/a><\/noindex>. Dob\u00ebsia \u00ebsht\u00eb zbuluar nga hulumtuesit e siguris\u00eb n\u00eb kompani Apple.<\/p>\n

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

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

\u0412 \u0443\u0442\u0438\u043b\u0438\u0442\u0435 Sudo, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u043e\u0439 \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u043c\u0430\u043d\u0434 \u043e\u0442 \u0438\u043c\u0435\u043d\u0438 \u0434\u0440\u0443\u0433\u0438\u0445 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2019-14287), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u043c\u0430\u043d\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root, \u043f\u0440\u0438 \u043d\u0430\u043b\u0438\u0447\u0438\u0438 \u0432 \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430\u0445 sudoers \u043f\u0440\u0430\u0432\u0438\u043b, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0432 \u0441\u0435\u043a\u0446\u0438\u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u0430 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f \u043f\u043e\u0441\u043b\u0435 \u0440\u0430\u0437\u0440\u0435\u0448\u0430\u044e\u0449\u0435\u0433\u043e \u043a\u043b\u044e\u0447\u0435\u0432\u043e\u0433\u043e \u0441\u043b\u043e\u0432\u0430 «ALL» \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u044f\u0432\u043d\u044b\u0439 \u0437\u0430\u043f\u0440\u0435\u0442 \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root («… (ALL, !root) …»). \u0412 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u044f\u0445 \u043f\u043e […]<\/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-38918","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\udd47Vulnerabiliteti n\u00eb sudo q\u00eb lejon rritjen e privilegjeve duke p\u00ebrdorur rregulla specifike | ProHoster","description":"N\u00eb utilitarin Sudo, i cili p\u00ebrdoret p\u00ebr organizimin e ekzekutimit t\u00eb komandave n\u00eb em\u00ebr t\u00eb p\u00ebrdoruesve t\u00eb 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