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CVE-2019-13272: Linux Kernel Improper Privilege Management Vulnerability

High · CVSS 7.8 (CVSS 3.1)KEV known exploitedEPSS 52.2%, 99th percentilePublished Updated Assigner: mitre

In CISA’s Known Exploited Vulnerabilities catalog: Linux Kernel Improper Privilege Management Vulnerability.

Added , federal remediation due . Known ransomware use: Unknown.

Required action: Apply updates per vendor instructions.

Description

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.

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

Status incidents that name it

No tracked status incident names this CVE.

Affected vendors and products

Linux: Kernel

References

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