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Privilege Dropping / Lowering Errors The advisory has been revoked - it doesn't affect any version of package kernel-headers  (opens in a new tab)

Threat Intelligence

Exploit Maturity
Attacked
EPSS
52.2% (99th percentile)

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  • Snyk IDSNYK-RHEL8-KERNELHEADERS-3470905
  • published26 Jul 2021
  • disclosed16 Jul 2019
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Introduced: 16 Jul 2019

CVE-2019-13272  (opens in a new tab)
CWE-271  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL.

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.

References