ALT-PU-2019-2549-1

Package update shadow in branch sisyphus

Version4.5-alt5

Published2019-08-27

Max severityMEDIUM

Severity:

Closed issues (2)

MEDIUM5.3

Уязвимость компонента /proc/self/setgroups утилиты для управления учетными записями shadow, связанная с неправильным назначением разрешений для файлов, позволяющая нарушителю повысить свои привилегии

Published: 2022-02-10Modified: 2024-04-27

CVSS 3.xMEDIUM 5.3

CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS 2.0MEDIUM 5.0

CVSS:2.0/AV:N/AC:L/Au:N/C:P/I:N/A:N

References

CVE-2018-7169

MEDIUM5.3

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.

Published: 2018-02-15Modified: 2024-11-21

CVSS 2.0MEDIUM 5.0

CVSS:2.0/AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS 3.xMEDIUM 5.3

CVSS:3.x/CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References