{"id":103040,"date":"2022-01-20T21:36:44","date_gmt":"2022-01-20T19:36:44","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-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82%d0%bd%d0%be%d0%b9-%d0%b1%d0%b8%d0%b1%d0%bb%d0%b8%d0%be%d1%82%d0%b5%d0%ba%d0%b5"},"modified":"2022-01-20T21:36:44","modified_gmt":"2022-01-20T19:36:44","slug":"%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82%d0%bd%d0%be%d0%b9-%d0%b1%d0%b8%d0%b1%d0%bb%d0%b8%d0%be%d1%82%d0%b5%d0%ba%d0%b5","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d1%8c-%d0%b2-%d1%81%d1%82%d0%b0%d0%bd%d0%b4%d0%b0%d1%80%d1%82%d0%bd%d0%be%d0%b9-%d0%b1%d0%b8%d0%b1%d0%bb%d0%b8%d0%be%d1%82%d0%b5%d0%ba%d0%b5","title":{"rendered":"Haavatavus Rusti keele standardteegis","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Rusti standardteegis avastati haavatavus (CVE-2022-21658), mis on seotud v\u00f5istlusolukorraga funktsioonis std::fs::remove_dir_all(). Kui seda funktsiooni kasutatakse ajutiste failide kustutamiseks privileegiga rakenduses, v\u00f5ib r\u00fcndaja saavutada juhuslike s\u00fcsteemifailide ja kaustade kustutamise, millele tal tavaliselt juurdep\u00e4\u00e4su ei ole. <\/p>\n

Haavatavus tuleneb s\u00fcmboolsete linkide kontrollimise vale rakendamise t\u00f5ttu kaustade rekursiivsete kustutamiste korral. Selle asemel, et keelata s\u00fcmboolsete linkide j\u00e4rgimine, kontrollib funktsioon remove_dir_all() esmalt, kas fail on s\u00fcmboolne link. Kui link on m\u00e4\u00e4ratud, kustutatakse see failina, ja kui see on kaust, kutsutakse esile sisu rekursiivne kustutamistoiming. Probleem seisneb selles, et kontrollimise ja kustutamise algatamise vahel on v\u00e4ike viivitus. <\/p>\n

Moment, mil kontroll on juba teostatud, kuid kataloogide l\u00e4bimise operatsioon kustutamiseks ei ole veel alanud, saab r\u00fcndaja asendada ajutiste failide katalooge s\u00fcmboolse lingiga. Kui \u00f5igel hetkel, funktsioon remove_dir_all() t\u00f6\u00f6tleb s\u00fcmboolset linki kui katalooge ja hakkab kustutama sisu, millele see link viitab. Hoolimata sellest, et r\u00fcnnaku \u00f5nnestumine s\u00f5ltub katalooge asendamise t\u00e4psest ajast ja \u00f5ige hetke tabamine on ebat\u00f5en\u00e4oline, on teadlased katsete k\u00e4igus suutnud r\u00fcnnakut edukalt korrata p\u00e4rast eksploidimist vaid m\u00f5ne sekundi jooksul. <\/p>\n

Haavatavad on k\u00f5ik Rusti versioonid vahemikus 1.0.0 kuni 1.58.0, sealhulgas. Probleem on ajutiselt lahendatud plaastri vormis (parandus lisatakse versiooni 1.58.1, mis on oodata m\u00f5ne tunni jooksul). Haavatavuse k\u00f5rvaldamist distributsioonides saab j\u00e4lgida j\u00e4rgmistelt lehtedelt: Debian, RHEL, SUSE, Fedora, Ubuntu, Arch, FreeBSD. K\u00f5igile Rusti keeles kirjutatud programmide kasutajatele, mis t\u00f6\u00f6tavad suurenenud privileegidega ja kasutavad funktsiooni remove_dir_all, soovitatakse kiiresti uuendada Rusti versioonile 1.58.1. Huvi p\u00e4rast, v\u00e4lja antud plaaster ei lahenda probleemi k\u00f5igis s\u00fcsteemides, n\u00e4iteks REDOXi OS-is ja macOS versioonides enne 10.10 (Yosemite) ei blokeerita haavatavust O_NOFOLLOW lipu puudumise t\u00f5ttu, mis keelab s\u00fcmboolsete linkide j\u00e4rgimise.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 \u044f\u0437\u044b\u043a\u0430 Rust \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-21658), \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435\u043c \u0433\u043e\u043d\u043a\u0438 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 std::fs::remove_dir_all(). \u0412 \u0441\u043b\u0443\u0447\u0430\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u043e\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0434\u043b\u044f \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 \u0432 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c 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\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 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 \u044f\u0437\u044b\u043a\u0430 Rust | ProHoster","og:description":"\u0412 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 \u044f\u0437\u044b\u043a\u0430 Rust \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-21658), \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435\u043c \u0433\u043e\u043d\u043a\u0438 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 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