{"id":105318,"date":"2022-10-17T21:36:42","date_gmt":"2022-10-17T19:36:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-libksba-privodyashhaya-k-vypolneniyu-koda-pri-obrabotke-s-mime-v-gnupg"},"modified":"2022-10-17T21:36:42","modified_gmt":"2022-10-17T19:36:42","slug":"uyazvimost-v-libksba-privodyashhaya-k-vypolneniyu-koda-pri-obrabotke-s-mime-v-gnupg","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/uyazvimost-v-libksba-privodyashhaya-k-vypolneniyu-koda-pri-obrabotke-s-mime-v-gnupg","title":{"rendered":"LibKSBA haavatavus, mis v\u00f5imaldab koodi t\u00e4itmist S\/MIME t\u00f6\u00f6tlemisel GnuPG-s","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

LibKSBA teeg, mida arendab GnuPG projekt ja mis pakub funktsioone X.509 sertifikaatide haldamiseks, on leitud kriitiline haavatavus (CVE-2022-3515), mis p\u00f5hjustab t\u00e4isarvu \u00fclevoolu ja lubamatut andmete kirjutamist eraldatud puhvri piirest, kui anal\u00fc\u00fcsitakse ASN.1 struktuure, mida kasutatakse S\/MIME, X.509 ja CMS-is. Probleemi s\u00fcvendab asjaolu, et Libksba raamatukogu kasutatakse GnuPG paketis ning see haavatavus v\u00f5ib v\u00f5imaldada r\u00fcndajal kaugk\u00e4e v\u00e4ljakutsumist, kui GnuPG (gpgsm) t\u00f6\u00f6tleb S\/MIME-de kasutavate failide v\u00f5i e-kirjade kr\u00fcpteeritud v\u00f5i allkirjastatud andmeid. Lihtsaimal juhul piisab r\u00fcndamiseks, kui ohver kasutab GnuPG ja S\/MIME toega e-posti klienti ning talle saadetakse spetsiaalselt vormistatud kiri. <\/p>\n

Haavatavust saab kasutada ka r\u00fcnnakute jaoks dirmngr serveritele, mis tegelevad t\u00fchistatud sertifikaatide (CRL-de) laadimise ja anal\u00fc\u00fcsimise ning TLS-is kasutatavate sertifikaatide valideerimisega. R\u00fcnnak dirmngrile v\u00f5ib toimuda r\u00fcndaja kontrolli all oleva veebiserver<\/a>, andes spetsiaalselt vormistatud CRL-e v\u00f5i sertifikaate. T m\u00e4rgitakse, et gpgsm ja dirmngr jaoks pole praegu avalikult kergesti kasutatavaid eksploidijaid leitud, kuid haavatavus on t\u00fc\u00fcpiline ja miski ei takista kvalifitseeritud r\u00fcndajatel iseseisva eksploidija ettevalmistamist. <\/p>\n

Haavatavus on k\u00f5rvaldatud Libksba 1.6.2 v\u00e4ljal ja GnuPG 2.3.8 binaarses versioonis. Linuxi distributsioonides tarnitakse Libksba tavaliselt eraldi s\u00f5ltuvusena, samas kui Windowsi kogumites on see GnuPG p\u00f5hipaigalduspaketi osa. P\u00e4rast uuendamist tuleb meeles pidada, et taustprotsessid tuleb peatada k\u00e4suga «gpgconf —kill all». Probleemi olemasolu kontrollimiseks k\u00e4su «gpgconf —show-versions» v\u00e4ljundis saab hinnata stringi «KSBA ….» v\u00e4\u00e4rtust, kus peab olema n\u00e4idatud versioon, mis ei ole madalam kui 1.6.2. <\/p>\n

Distribution updates ei ole veel v\u00e4lja antud, kuid nende ilmumist saab j\u00e4lgida lehtedelt: Debian, Ubuntu, Gentoo, RHEL, SUSE, Arch, FreeBSD. Haavatavus esineb ka GnuPG VS-Desktop MSI ja AppImage paketides ja Gpg4win-is.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 LibKSBA, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c GnuPG \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u0430\u043c\u0438 X.509, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u043a\u0440\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-3515), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0446\u0435\u043b\u043e\u0447\u0438\u0441\u043b\u0435\u043d\u043d\u043e\u043c\u0443 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0438 \u0437\u0430\u043f\u0438\u0441\u0438 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u0443\u0444\u0435\u0440\u0430 \u043f\u0440\u0438 \u0440\u0430\u0437\u0431\u043e\u0440\u0435 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440 ASN.1, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u044b\u0445 \u0432 S\/MIME, X.509 \u0438 CMS. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0443\u0441\u0443\u0433\u0443\u0431\u043b\u044f\u0435\u0442\u0441\u044f \u0442\u0435\u043c, \u0447\u0442\u043e \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 Libksba \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u0432 \u043f\u0430\u043a\u0435\u0442\u0435 GnuPG \u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a […]<\/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-105318","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\udd47LibKSBA haavatavus, mis v\u00f5imaldab koodi v\u00e4ljakutsumist S\/MIME t\u00f6\u00f6tlemisel GnuPG-s | ProHoster","description":"LibKSBA teeg, mida arendab GnuPG projekt ja mis pakub funktsioone X.509 sertifikaatidega t\u00f6\u00f6tamiseks, on leitud kriitiline haavatavus (CVE-2022-3515), mis p\u00f5hjustab t\u00e4isarvu \u00fclevoolu ja andmete 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