Improper Locking Affecting kernel-rt-doc package, versions <0:3.10.0-1127.rt56.1093.el7


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-CENTOS7-KERNELRTDOC-2155522
  • published26 Jul 2021
  • disclosed25 Apr 2016

Introduced: 25 Apr 2016

CVE-2019-3901  (opens in a new tab)
CWE-667  (opens in a new tab)

How to fix?

Upgrade Centos:7 kernel-rt-doc to version 0:3.10.0-1127.rt56.1093.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-doc package and not the kernel-rt-doc package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

A race condition in perf_event_open() allows local attackers to leak sensitive data from setuid programs. As no relevant locks (in particular the cred_guard_mutex) are held during the ptrace_may_access() call, it is possible for the specified target task to perform an execve() syscall with setuid execution before perf_event_alloc() actually attaches to it, allowing an attacker to bypass the ptrace_may_access() check and the perf_event_exit_task(current) call that is performed in install_exec_creds() during privileged execve() calls. This issue affects kernel versions before 4.8.

CVSS Scores

version 3.1