CVE-2019-13272

Published Jul 17, 2019

Last updated 6 months ago

Exploit knownCVSS high 7.8

Overview

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.
Source
cve@mitre.org
NVD status
Analyzed
Products
linux_kernel, debian_linux, fedora, ubuntu_linux, enterprise_linux, enterprise_linux_for_arm_64, enterprise_linux_for_ibm_z_systems, enterprise_linux_for_real_time, enterprise_linux_for_real_time_for_nfv, enterprise_linux_for_real_time_for_nfv_tus, enterprise_linux_for_real_time_tus, aff_a700s_firmware, h410c_firmware, h610s_firmware, active_iq_unified_manager, e-series_performance_analyzer, e-series_santricity_os_controller, hci_management_node, service_processor, solidfire, steelstore_cloud_integrated_storage, hci_compute_node

Risk scores

CVSS 3.1

Type
Primary
Base score
7.8
Impact score
5.9
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Severity
HIGH

CVSS 2.0

Type
Primary
Base score
7.2
Impact score
10
Exploitability score
3.9
Vector string
AV:L/AC:L/Au:N/C:C/I:C/A:C

Known exploits

Data from CISA

Vulnerability name
Linux Kernel Improper Privilege Management Vulnerability
Exploit added on
Dec 10, 2021
Exploit action due
Jun 10, 2022
Required action
Apply updates per vendor instructions.

Weaknesses

nvd@nist.gov
NVD-CWE-noinfo

Social media

Hype score
Not currently trending

Configurations

Related CVEs

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References

Sources include official advisories and independent security research.