{"id":98993,"date":"2021-02-02T20:42:15","date_gmt":"2021-02-02T18:42:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-sistemnom-vyzove-futex-obnaruzhena-i-ustranena-vozmozhnost-vypolneniya-polzovatelskogo-koda-v-kontekste-yadra"},"modified":"2021-02-02T20:42:15","modified_gmt":"2021-02-02T18:42:15","slug":"v-sistemnom-vyzove-futex-obnaruzhena-i-ustranena-vozmozhnost-vypolneniya-polzovatelskogo-koda-v-kontekste-yadra","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/v-sistemnom-vyzove-futex-obnaruzhena-i-ustranena-vozmozhnost-vypolneniya-polzovatelskogo-koda-v-kontekste-yadra","title":{"rendered":"Une possibilit\u00e9 d'ex\u00e9cution de code utilisateur dans le contexte du noyau a \u00e9t\u00e9 d\u00e9tect\u00e9e et corrig\u00e9e dans l'appel syst\u00e8me futex","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dans la mise en \u0153uvre de l'appel syst\u00e8me futex (mutex rapide en espace utilisateur), une utilisation de la m\u00e9moire de pile apr\u00e8s son allocation a \u00e9t\u00e9 d\u00e9couverte et corrig\u00e9e. Cela permettait \u00e0 un attaquant d'ex\u00e9cuter son code dans le contexte du noyau, avec toutes les cons\u00e9quences en mati\u00e8re de s\u00e9curit\u00e9 qui en d\u00e9coulent. La vuln\u00e9rabilit\u00e9 se trouvait dans le code du gestionnaire d'erreurs.<\/p>\n

<\/p>\n

Correction<\/a> Cette vuln\u00e9rabilit\u00e9 est apparue dans le noyau Linux mainline le 28 janvier et a \u00e9t\u00e9 int\u00e9gr\u00e9e avant-hier dans les noyaux 5.10.12, 5.4.94, 4.19.172, 4.14.218.<\/p>\n

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

Lors de la discussion de ce correctif, il a \u00e9t\u00e9 \u00e9mis l'hypoth\u00e8se que cette vuln\u00e9rabilit\u00e9 existe dans tous les noyaux depuis 2008 :<\/p>\n

<\/p>\n

https:\/\/www.openwall.com\/lists\/oss-security\/2021\/01\/29\/3<\/a><\/p>\n

<\/noindex>
\nPour information, ce commit a :<\/p>\n

Corrections : 1b7558e457ed (\"futexes : corriger le traitement des erreurs dans futex_lock_pi\")<\/p>\n

et cet autre commit date de 2008. Il est donc probable que toutes les distributions et d\u00e9ploiements Linux actuellement maintenus soient affect\u00e9s, \u00e0 moins qu'une autre mesure d'att\u00e9nuation n'ait \u00e9t\u00e9 appliqu\u00e9e dans certaines versions du noyau.
\nles distributions et d\u00e9ploiements Linux maintenus sont affect\u00e9s, sauf si quelque chose
\natt\u00e9nuait le probl\u00e8me dans certaines versions du noyau.<\/p>\n

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

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