{"id":184060,"date":"2026-10-31T23:40:47","date_gmt":"2026-10-31T21:40:47","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/detali-vozmozhnoj-ataki-na-gnu-savannah-pozvolyavshej-skomprometirovat-repozitorii-bash-i-coreutils"},"modified":"2026-10-31T23:40:51","modified_gmt":"2026-10-31T21:40:51","slug":"details-of-a-potential-attack-on-gnu-savannah-that-could-have-compromised-bash-and-coreutils-repositories","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/details-of-a-potential-attack-on-gnu-savannah-that-could-have-compromised-bash-and-coreutils-repositories","title":{"rendered":"A GNU Savannah lehets\u00e9ges t\u00e1mad\u00e1s\u00e1nak r\u00e9szletei, amely lehet\u0151v\u00e9 tette a Bash \u00e9s Coreutils t\u00e1rol\u00f3k kompromitt\u00e1l\u00e1s\u00e1t","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Hacktron bejelentette a GNU Savannah ny\u00edlt forr\u00e1sk\u00f3d\u00fa hosztol\u00f3 szolg\u00e1ltat\u00e1sra tett demonstrat\u00edv t\u00e1mad\u00e1s r\u00e9szleteit, amelyet tov\u00e1bbra is haszn\u00e1lnak egyes GNU eszk\u00f6z\u00f6k, p\u00e9ld\u00e1ul a Bash \u00e9s a Coreutils fejleszt\u00e9s\u00e9re. A v\u00e9grehajtott k\u00eds\u00e9rlet eredm\u00e9nyek\u00e9nt siker\u00fclt k\u00f3dot futtatni a GNU Savannah szerver\u00e9n, megszerezni a root jogosults\u00e1gokat, kicser\u00e9lni a Bash projektet t\u00e1mogat\u00f3 SSH kulcsait, felfedni a lehet\u0151s\u00e9get a Bash alap git-t\u00e1rhely\u00e9nek m\u00f3dos\u00edt\u00e1s\u00e1ra \u00e9s hozz\u00e1f\u00e9rni a biztons\u00e1gi ment\u00e9sek szerver\u00e9hez.<\/p>\n

A teszt-t\u00e1mad\u00e1sr\u00f3l \u00e9s az \u00e9szlelt probl\u00e9m\u00e1kr\u00f3l azonnal besz\u00e1moltak a GNU Savannah adminisztr\u00e1torainak. A probl\u00e9m\u00e1kat m\u00e1jusban orvosolt\u00e1k. A kutat\u00f3k \u00f6sszesen 9 sebezhet\u0151s\u00e9get azonos\u00edtottak, ebb\u0151l 2 kritikus, 4 pedig vesz\u00e9lyes. Az els\u0151 kritikus sebezhet\u0151s\u00e9g lehet\u0151v\u00e9 tette a hiteles\u00edt\u00e9s megker\u00fcl\u00e9s\u00e9t a webhely adminisztr\u00e1tor\u00e1nak (siteadmin\/triggercreation.php) el\u00e9rhet\u0151 be\u00e1ll\u00edt\u00e1saihoz val\u00f3 hozz\u00e1f\u00e9r\u00e9s sor\u00e1n.<\/p>\n

A m\u00e1sodik kritikus sebezhet\u0151s\u00e9g lehet\u0151v\u00e9 tette k\u00f3d futtat\u00e1s\u00e1t szerveren<\/a> a megfelel\u0151en kialak\u00edtott email megad\u00e1s\u00e1val. A probl\u00e9m\u00e1t a speci\u00e1lis karakterek helyes kezel\u00e9s\u00e9nek hi\u00e1nya okozta, \u00e9s ki lehetett haszn\u00e1lni olyan email megad\u00e1s\u00e1val a regisztr\u00e1ci\u00f3 sor\u00e1n, mint «a`touch${IFS}\\\/tmp\\\/savane-rce-proof`@example.com», majd a webes fel\u00fcleten a GPG-kulcs ellen\u0151rz\u00e9se gomb megnyom\u00e1s\u00e1val (az email a gpg eszk\u00f6z ind\u00edt\u00e1si sor\u00e1ba ker\u00fclt, amelyet a PHP proc_open() funkci\u00f3ja h\u00edvott meg). <\/p>\n

Miut\u00e1n a web-szerver jogosults\u00e1gaival k\u00f3dot hajtottak v\u00e9gre, a kutat\u00f3k felfedezt\u00e9k az adatb\u00e1zis jelszav\u00e1t a konfigur\u00e1ci\u00f3s f\u00e1jlban, \u00e9s megv\u00e1ltoztatt\u00e1k a saj\u00e1t bejegyzett fi\u00f3kjuk hozz\u00e1f\u00e9r\u00e9si jogait nem privilegiz\u00e1lt felhaszn\u00e1l\u00f3r\u00f3l adminisztr\u00e1torra az adatb\u00e1zisban. Az adminisztr\u00e1tori jogok a Savannah webes fel\u00fclet\u00e9n lehet\u0151v\u00e9 tett\u00e9k sz\u00e1mukra, hogy b\u00e1rmilyen felhaszn\u00e1l\u00f3 nev\u00e9ben dolgozzanak jelsz\u00f3 megad\u00e1sa n\u00e9lk\u00fcl. A kutat\u00f3k kihaszn\u00e1lt\u00e1k ezt a lehet\u0151s\u00e9get, bejelentkeztek a Bash projekt t\u00e1mogat\u00f3j\u00e1nak nev\u00e9ben, \u00e9s felfedezt\u00e9k, hogy hozz\u00e1adhatj\u00e1k a saj\u00e1t SSH kulcsaikat a git-t\u00e1rhelyhez val\u00f3 kapcsol\u00f3d\u00e1shoz. Amennyiben a kulcsot hozz\u00e1adt\u00e1k, lehet\u0151s\u00e9g ny\u00edlt arra, hogy a Bash-t t\u00e1mogat\u00f3 f\u00e9l nev\u00e9ben commitokat k\u00fcldhessenek.<\/p>\n

A root jogosults\u00e1gokat a Linux kernelben kor\u00e1bban m\u00e1r ismert sebezhet\u0151s\u00e9g kihaszn\u00e1l\u00e1s\u00e1val szerezt\u00e9k meg, amely nem volt friss\u00edtve a szerveren (a Trisquel GNU\/Linux 11 disztrib\u00faci\u00f3 volt telep\u00edtve).
\nUbuntu 22.04 linux-libre 5.15-\u00f6s kernel\u00e9vel). A t\u00e1mad\u00e1s az OverlayFS-ben (CVE-2023-2640) tal\u00e1lhat\u00f3 sebezhet\u0151s\u00e9get kihaszn\u00e1lva t\u00f6rt\u00e9nt. \u00c9rdekess\u00e9g, hogy a sebezhet\u0151s\u00e9g jav\u00edt\u00e1sa m\u00e1r 2023-t\u00f3l el\u00e9rhet\u0151 volt, de a Canonical c\u00e9g csak a 5.19-es \u00e9s 6.2-es kernelen orvosolta a probl\u00e9m\u00e1t, m\u00edg a 5.15-\u00f6s kernelhez a jav\u00edt\u00e1st 2026. m\u00e1jus 7-\u00e9n adta ki. A root jogosults\u00e1gok megszerz\u00e9se ut\u00e1n a kutat\u00f3k felfedezt\u00e9k a rendszerben a «gnubackup» felhaszn\u00e1l\u00f3 SSH-kulcs\u00e1t, amely jelsz\u00f3 n\u00e9lk\u00fcl kapcsol\u00f3dni tudott a biztons\u00e1gi ment\u00e9seket t\u00e1rol\u00f3 hoszthoz.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Hacktron \u0440\u0430\u0441\u043a\u0440\u044b\u043b\u0430 \u043f\u043e\u0434\u0440\u043e\u0431\u043d\u043e\u0441\u0442\u0438 \u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0430\u0442\u0430\u043a\u0438 \u043d\u0430 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0433\u043e \u043a\u043e\u0434\u0430 GNU Savannah, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u043e\u0432 GNU, \u0432\u043a\u043b\u044e\u0447\u0430\u044f Bash \u0438 Coreutils. \u0412 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435 \u043f\u0440\u043e\u0432\u0435\u0434\u0451\u043d\u043d\u043e\u0433\u043e \u044d\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430 \u0443\u0434\u0430\u043b\u043e\u0441\u044c \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 GNU Savannah, \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043d\u0430 \u043d\u0451\u043c \u043f\u0440\u0430\u0432\u0430 root, \u0437\u0430\u043c\u0435\u043d\u0438\u0442\u044c SSH-\u043a\u043b\u044e\u0447\u0438 \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u044e\u0449\u0435\u0433\u043e Bash, \u0432\u044b\u044f\u0432\u0438\u0442\u044c \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 git-\u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0439 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Bash \u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-184060","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\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\udd47A GNU Savannah ellen lehets\u00e9ges t\u00e1mad\u00e1s r\u00e9szletei, amelyek lehet\u0151v\u00e9 tett\u00e9k a Bash \u00e9s Coreutils rep\u00f3k kompromitt\u00e1l\u00e1s\u00e1t | ProHoster","description":"A Hacktron c\u00e9g r\u00e9szleteket k\u00f6z\u00f6lt a GNU Savannah ny\u00edlt forr\u00e1sk\u00f3d\u00fa t\u00e1rhely\u00e9n v\u00e9grehajtott demonstr\u00e1ci\u00f3s t\u00e1mad\u00e1sr\u00f3l, amelyet tov\u00e1bbra is haszn\u00e1lnak egyes GNU eszk\u00f6z\u00f6k, p\u00e9ld\u00e1ul a Bash \u00e9s a Coreutils fejleszt\u00e9s\u00e9re.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/details-of-a-potential-attack-on-gnu-savannah-that-could-have-compromised-bash-and-coreutils-repositories","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0414\u0435\u0442\u0430\u043b\u0438 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0439 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Coreutils.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/details-of-a-potential-attack-on-gnu-savannah-that-could-have-compromised-bash-and-coreutils-repositories","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-10-31T21:40:47+00:00","article:modified_time":"2026-10-31T21:40:51+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/184060","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/comments?post=184060"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/184060\/revisions"}],"predecessor-version":[{"id":184061,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/184060\/revisions\/184061"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=184060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=184060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=184060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}