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Loop with Unreachable Exit Condition ('Infinite Loop') Affecting kernel-tools-devel package, versions <0:4.14.133-113.105.amzn2

Severity

 Recommended
high

Based on Amazon Linux security rating

    Threat Intelligence

    EPSS
    0.1% (43rd percentile)

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  • Snyk ID SNYK-AMZN2-KERNELTOOLSDEVEL-1671291
  • published 27 Sep 2021
  • disclosed 25 Apr 2019
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Introduced: 25 Apr 2019

CVE-2019-3900 Open this link in a new tab
CWE-835 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 kernel-tools-devel to version 0:4.14.133-113.105.amzn2 or higher.
This issue was patched in ALAS2-2019-1232.

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.

An infinite loop issue was found in the vhost_net kernel module in Linux Kernel up to and including v5.1-rc6, while handling incoming packets in handle_rx(). It could occur if one end sends packets faster than the other end can process them. A guest user, maybe remote one, could use this flaw to stall the vhost_net kernel thread, resulting in a DoS scenario.

References

CVSS Scores

version 3.1
Expand this section

NVD

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