{"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\/nl\/blog\/news\/v-sistemnom-vyzove-futex-obnaruzhena-i-ustranena-vozmozhnost-vypolneniya-polzovatelskogo-koda-v-kontekste-yadra","title":{"rendered":"In the system call futex, a possibility of executing user code in the kernel context was discovered and eliminated.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

In the implementation of the futex (fast userspace mutex) system call, the use of stack memory after release was discovered and eliminated. This, in turn, allowed an attacker to execute their code in the kernel context, with all the resulting security implications. The vulnerability was located in the error handling code.<\/p>\n

<\/p>\n

Oplossing<\/a> This vulnerability appeared in the Linux mainline on January 28 and was included in the kernels 5.10.12, 5.4.94, 4.19.172, 4.14.218 two days ago.<\/p>\n

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

During the discussion of this fix, it was suggested that this vulnerability exists in all kernels starting from 2008:<\/p>\n

<\/p>\n

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

<\/noindex>
\nFWIW, this commit has:<\/p>\n

Fixes: 1b7558e457ed (\"futexes: foutafhandeling in futex_lock_pi herstellen\")<\/p>\n

and that other commit is from 2008. So probably all currently
\nmaintained Linux distros and deployments are affected, unless something
\nelse mitigated the issue in some kernel versions.<\/p>\n

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

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