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Allocation of Resources Without Limits or Throttling Affecting kernel-uek-debug package, versions <0:2.6.39-400.312.2.el5uek

Severity

 Recommended
0.0
high
0
10

Based on Oracle Linux security rating

    Threat Intelligence

    EPSS
    97.39% (100th percentile)

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  • Snyk ID SNYK-ORACLE5-KERNELUEKDEBUG-2545779
  • published 10 Apr 2022
  • disclosed 19 Jun 2019
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Introduced: 19 Jun 2019

CVE-2019-11479 Open this link in a new tab
CWE-770 Open this link in a new tab

How to fix?

Upgrade Oracle:5 kernel-uek-debug to version 0:2.6.39-400.312.2.el5uek or higher.
This issue was patched in ELSA-2019-4689.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-debug package and not the kernel-uek-debug package as distributed by Oracle. See How to fix? for Oracle:5 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
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