Improper Locking Affecting kernel-uek-firmware package, versions <0:4.1.12-124.56.1.el6uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-ORACLE6-KERNELUEKFIRMWARE-2600160
  • published10 Apr 2022
  • disclosed22 Apr 2019

Introduced: 22 Apr 2019

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

How to fix?

Upgrade Oracle:6 kernel-uek-firmware to version 0:4.1.12-124.56.1.el6uek or higher.
This issue was patched in ELSA-2021-9473.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-firmware package and not the kernel-uek-firmware package as distributed by Oracle. See How to fix? for Oracle:6 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