Resource Exhaustion Affecting kernel-rt-trace-devel package, versions <0:3.10.0-957.21.3.rt56.935.el7


Severity

high

    Threat Intelligence

    EPSS
    97.39% (100th percentile)

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  • Snyk ID SNYK-CENTOS7-KERNELRTTRACEDEVEL-2134746
  • published 26 Jul 2021
  • disclosed 17 Jun 2019

How to fix?

Upgrade Centos:7 kernel-rt-trace-devel to version 0:3.10.0-957.21.3.rt56.935.el7 or higher.

NVD Description

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

Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363.

References

CVSS Scores

version 3.1
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Snyk

5.3 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)
    Low
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NVD

7.5 high
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SUSE

7.5 high
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Red Hat

5.3 medium