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Improper Input Validation Affecting kernel-tools-devel 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 ID SNYK-AMZN2-KERNELTOOLSDEVEL-1665199
  • published 27 Sep 2021
  • disclosed 6 Sep 2018
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Introduced: 6 Sep 2018

CVE-2018-5391 Open this link in a new tab
CWE-20 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 kernel-tools-devel 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-tools-devel package and not the kernel-tools-devel 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
Expand this section

NVD

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High