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Information Exposure Affecting kernel-rt-trace package, versions <0:3.10.0-957.10.1.rt56.921.el7

Severity

 Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-RHEL7-KERNELRTTRACE-1505941
  • published26 Jul 2021
  • disclosed27 Sept 2018
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Introduced: 27 Sep 2018

CVE-2018-17972  (opens in a new tab)
CWE-200  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade RHEL:7 kernel-rt-trace to version 0:3.10.0-957.10.1.rt56.921.el7 or higher.
This issue was patched in RHSA-2019:0514.

NVD Description

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

An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel through 4.18.11. It does not ensure that only root may inspect the kernel stack of an arbitrary task, allowing a local attacker to exploit racy stack unwinding and leak kernel task stack contents.

References