CVE-2019-13272

Known Exploited Vulnerability

Linux Kernel Improper Privilege Management Vulnerability

Vendor / product: Linux / Kernel

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.

Weakness classification

• nvd@nist.gov: NVD-CWE-noinfo

Primary references

• cve@mitre.org — Third Party Advisory, VDB Entry
• cve@mitre.org — Third Party Advisory, VDB Entry
• cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
• cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
• cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
• cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
• cve@mitre.org — Third Party Advisory
• cve@mitre.org — Third Party Advisory
• cve@mitre.org — Third Party Advisory
• cve@mitre.org — Exploit, Issue Tracking, Patch, Third Party Advisory
• cve@mitre.org — Issue Tracking, Patch
• cve@mitre.org — Issue Tracking, Patch, Third Party Advisory