Improper Input Validation Affecting kernel package, versions <0:4.14.62-70.117.amzn2


Severity

Recommended
critical

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
1.66% (89th percentile)

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  • Snyk IDSNYK-AMZN2-KERNEL-1665171
  • published27 Sept 2021
  • disclosed6 Sept 2018

Introduced: 6 Sep 2018

CVE-2018-5391  (opens in a new tab)
CWE-20  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade Amazon-Linux:2 kernel to version 0:4.14.62-70.117.amzn2 or higher.
This issue was patched in ALAS2-2018-1058.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size.

References

CVSS Scores

version 3.1