CVE-2019-13272
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.
ACTIVELY EXPLOITED IN THE WILD
This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
Linux Kernel Improper Privilege Management Vulnerability
Linux Kernel
Apply updates per vendor instructions.
12/10/2021
https://nvd.nist.gov/vuln/detail/CVE-2019-13272
Vulnerability Summary
CVSS v3 Score
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2 Score
AV:L/AC:L/Au:N/C:C/I:C/A:C
EPSS Score (Exploitation Probability)
This vulnerability has a 80.38% probability of being exploited in the next 30 days, ranking higher than 99% of all scored CVEs.
CWE Classification
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Similar SeverityHIGH
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