{"id":102964,"date":"2022-01-14T21:37:17","date_gmt":"2022-01-14T19:37:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-xfs-%d0%bf%d0%be%d0%b7%d0%b2%d0%be%d0%bb%d1%8f%d1%8e%d1%89%d0%b0%d1%8f-%d1%87%d0%b8%d1%82%d0%b0%d1%82%d1%8c-%d1%81%d1%8b%d1%80"},"modified":"2022-01-14T21:37:17","modified_gmt":"2022-01-14T19:37:17","slug":"%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-xfs-%d0%bf%d0%be%d0%b7%d0%b2%d0%be%d0%bb%d1%8f%d1%8e%d1%89%d0%b0%d1%8f-%d1%87%d0%b8%d1%82%d0%b0%d1%82%d1%8c-%d1%81%d1%8b%d1%80","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-xfs-%d0%bf%d0%be%d0%b7%d0%b2%d0%be%d0%bb%d1%8f%d1%8e%d1%89%d0%b0%d1%8f-%d1%87%d0%b8%d1%82%d0%b0%d1%82%d1%8c-%d1%81%d1%8b%d1%80","title":{"rendered":"Dob\u00ebsia n\u00eb XFS, e cila lejon leximin e t\u00eb dh\u00ebnave t\u00eb pap\u00ebrpunuara nga pajisja bllokuese.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

N\u00eb kodin e sistemit t\u00eb files XFS \u00ebsht\u00eb zbuluar nj\u00eb vulnerabilitet (CVE-2021-4155) q\u00eb i lejon nj\u00eb p\u00ebrdoruesi lokal pa privilegje t\u00eb lexoj\u00eb t\u00eb dh\u00ebna nga blloqet e pap\u00ebrdorura direkt nga pajisja bllok. T\u00eb gjitha versionet e r\u00ebnd\u00ebsishme t\u00eb b\u00ebrtham\u00ebs Linux m\u00eb t\u00eb vjetra se 5.16, q\u00eb p\u00ebrmbajn\u00eb driverin XFS, jan\u00eb t\u00eb ndjeshme ndaj k\u00ebtij problemi. Rregullimi \u00ebsht\u00eb p\u00ebrfshir\u00eb n\u00eb versionin 5.16, si dhe n\u00eb azhurnimet e b\u00ebrthamave 5.15.14, 5.10.91, 5.4.171, 4.19.225, etj. Statusi i formimit t\u00eb azhurnimeve p\u00ebr zgjidhjen e problemas n\u00eb distribucionet mund t\u00eb gjendet n\u00eb k\u00ebto faqe: Debian, RHEL, SUSE, Fedora, Ubuntu, Arch. <\/p>\n

Vulnerabiliteti shkaktohet nga sjellja e gabuar e dy ioctl (XFS_IOC_ALLOCSP) dhe ioctl (XFS_IOC_FREESP) specifike p\u00ebr XFS, t\u00eb cilat jan\u00eb ekuivalent\u00eb funksional me thirrjen sistemore fallocate(). Kur rritet madh\u00ebsia e nj\u00eb skedari, q\u00eb nuk \u00ebsht\u00eb e rregulluar n\u00eb madh\u00ebsin\u00eb e bllokut, ioctl XFS_IOC_ALLOCSP\/XFS_IOC_FREESP nuk e zbrazin byt\u00ebt e fundit deri n\u00eb kufirin e ardhsh\u00ebm t\u00eb bllokut. Pra, n\u00eb XFS me madh\u00ebsi standarde blloku 4096 byt, sulmuesi mund t\u00eb lexoj\u00eb deri n\u00eb 4095 byt t\u00eb dh\u00ebnash t\u00eb shkruara m\u00eb par\u00eb nga \u00e7do bllok. T\u00eb dh\u00ebna e skedar\u00ebve t\u00eb fshira, skedar\u00ebve t\u00eb defragmatuara si dhe skedar\u00ebve me blloqe t\u00eb dedupikuara mund t\u00eb ekzistojn\u00eb n\u00eb k\u00ebto zona. <\/p>\n

Mund ta kontrolloni sistemin tuaj p\u00ebr k\u00ebt\u00eb problem p\u00ebrmes nj\u00eb prototipi t\u00eb thjesht\u00eb exploiti. N\u00ebse pas ekzekutimit t\u00eb sekuenc\u00ebs s\u00eb propozuar t\u00eb komandave arrini t\u00eb lexoni tekstin e Shekspirit, at\u00ebher\u00eb driveri i FS \u00ebsht\u00eb i ndjesh\u00ebm. Montimi fillestar i seksionit XFS p\u00ebr demonstrim k\u00ebrkon privilegje superp\u00ebrdoruesi. <\/p>\n

Pavar\u00ebsisht se ioctl(XFS_IOC_ALLOCSP) dhe ioctl(XFS_IOC_FREESP) nuk dallojn\u00eb shum\u00eb n\u00eb funksionalitet nga fallocate() standard, dhe dallimi i vet\u00ebm \u00ebsht\u00eb rrjedhja e t\u00eb dh\u00ebnave, pranimi i tyre duket si nj\u00eb backdoor. Megjith\u00ebse ka nj\u00eb politik\u00eb t\u00eb p\u00ebrgjithshme - t\u00eb mos ndryshohen nd\u00ebrfaqet ekzistuese n\u00eb b\u00ebrtham\u00eb, - me propozimin e Linusit, u mor vendimi p\u00ebr t\u00eb hequr plot\u00ebsisht k\u00ebto ioctl n\u00eb versionin e ardhsh\u00ebm.
\n
Burimi: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043a\u043e\u0434\u0435 \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b XFS \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-4155), \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 \u0447\u0438\u0442\u0430\u0442\u044c \u0434\u0430\u043d\u043d\u044b\u0435 \u043d\u0435\u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u044b\u0445 \u0431\u043b\u043e\u043a\u043e\u0432 \u043d\u0430\u043f\u0440\u044f\u043c\u0443\u044e \u0441 \u0431\u043b\u043e\u0447\u043d\u043e\u0433\u043e \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430. \u0412\u0441\u0435 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0432\u0435\u0440\u0441\u0438\u0438 \u044f\u0434\u0440\u0430 Linux \u0441\u0442\u0430\u0440\u0448\u0435 5.16, \u0441\u043e\u0434\u0435\u0440\u0436\u0430\u0449\u0438\u0435 \u0434\u0440\u0430\u0439\u0432\u0435\u0440 XFS, \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u044b \u044d\u0442\u043e\u0439 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0435. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0432\u043e\u0448\u043b\u043e \u0432 \u0432\u0435\u0440\u0441\u0438\u044e 5.16, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u044f\u0434\u0435\u0440 5.15.14, 5.10.91, 5.4.171, 4.19.225 \u0438 \u0442.\u0434. \u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b […]<\/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-102964","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 XFS, i cili lejon leximin e t\u00eb dh\u00ebnave t\u00eb pap\u00ebrpunuara t\u00eb pajisjes bllok | ProHoster","description":"N\u00eb kodin e sistemit t\u00eb files XFS \u00ebsht\u00eb zbuluar nj\u00eb vulnerabilitet (CVE-2021-4155) q\u00eb i lejon nj\u00eb p\u00ebrdoruesi lokal pa 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\u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0447\u0438\u0442\u0430\u0442\u044c \u0441\u044b\u0440\u044b\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u0431\u043b\u043e\u0447\u043d\u043e\u0433\u043e \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430 | ProHoster","og:description":"\u0412 \u043a\u043e\u0434\u0435 \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b XFS \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-4155), \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 \u0447\u0438\u0442\u0430\u0442\u044c \u0434\u0430\u043d\u043d\u044b\u0435 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