Fixed
Created: Jul 17, 2019
Updated: Aug 21, 2019
Resolved Date: Aug 11, 2019
Found In Version: 10.18.44.1
Fix Version: 10.18.44.10
Severity: Standard
Applicable for: Wind River Linux LTS 18
Component/s: Kernel
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.
CREATE(Triage): {Link=https://nvd.nist.gov/vuln/detail/CVE-2019-13272 User=admin}