ALT-BU-2019-3925-1
Branch p9 update bulletin.
Closed vulnerabilities
BDU:2022-00731
Уязвимость компонента /proc/self/setgroups утилиты для управления учетными записями shadow, связанная с неправильным назначением разрешений для файлов, позволяющая нарушителю повысить свои привилегии
Modified: 2024-11-21
CVE-2018-7169
An issue was discovered in shadow 4.5. newgidmap (in shadow-utils) is setuid and allows an unprivileged user to be placed in a user namespace where setgroups(2) is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if the administrator has used "group blacklisting" (e.g., chmod g-rwx) to restrict access to paths. This flaw effectively reverts a security feature in the kernel (in particular, the /proc/self/setgroups knob) to prevent this sort of privilege escalation.