ALT-PU-2019-2280-1

Package update kernel-image-un-def in branch p8

Version4.19.58-alt0.M80P.1

Published2019-07-16

Max severityHIGH

Severity:

Closed issues (2)

HIGH7.8

Уязвимость функции ptrace_link ядра операционных систем Linux, позволяющая нарушителю вызвать отказ в обслуживании или повысить свои привилегии

Published: 2020-04-29Modified: 2025-02-06

CVSS 3.xHIGH 7.8

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

CVSS 2.0MEDIUM 6.8

CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C

References

CVE-2019-13272

HIGH7.8

In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to create a ptrace relationship, which allows local users to obtain root access by leveraging certain scenarios with a parent-child process relationship, where a parent drops privileges and calls execve (potentially allowing control by an attacker). One contributing factor is an object lifetime issue (which can also cause a panic). Another contributing factor is incorrect marking of a ptrace relationship as privileged, which is exploitable through (for example) Polkit's pkexec helper with PTRACE_TRACEME. NOTE: SELinux deny_ptrace might be a usable workaround in some environments.

Published: 2019-07-17Modified: 2025-11-06

CVSS 2.0HIGH 7.2

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

CVSS 3.xHIGH 7.8

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References