Out-of-Bounds Affecting kernel-bootwrapper package, versions <0:3.10.0-514.21.2.el7


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    0.24% (63rd percentile)

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  • Snyk ID SNYK-RHEL7-KERNELBOOTWRAPPER-4684743
  • published 26 Jul 2021
  • disclosed 19 Jun 2017

How to fix?

Upgrade RHEL:7 kernel-bootwrapper to version 0:3.10.0-514.21.2.el7 or higher.
This issue was patched in RHSA-2017:1484.

NVD Description

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

An issue was discovered in the size of the stack guard page on Linux, specifically a 4k stack guard page is not sufficiently large and can be "jumped" over (the stack guard page is bypassed), this affects Linux Kernel versions 4.11.5 and earlier (the stackguard page was introduced in 2010).