CVE-2019-11479

Advisory lineage Upstream: 0 Downstream: 42
Modified
Published: 18 Jun 2019, 23:34
Last modified:16 Sept 2024, 23:22

Vulnerability Summary

Overall Risk (default)
medium
33/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
13.36% MEDIUM
13% probability -0.22%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

18 Jun 2019, 23:34
Published
Vulnerability first disclosed
16 Sept 2024, 23:22
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v3.0•MEDIUM•Score: 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 13.36%• Percentile: 94%

Techniques & Countermeasures

  • CWE-770•Allocation of Resources Without Limits or Throttling

    The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

  • CWE-405•Asymmetric Resource Consumption (Amplification)

    The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 18.10 | 19.04

  • f5•big-ip_access_policy_manager

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_advanced_firewall_manager

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_analytics

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_application_acceleration_manager

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_application_security_manager

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_domain_name_system

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_edge_gateway

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_fraud_protection_service

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_global_traffic_manager

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_link_controller

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_local_traffic_manager

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_policy_enforcement_manager

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-ip_webaccelerator

    ≥ 11.5.2, < 11.6.5.1 | ≥ 12.1.0, < 12.1.5.1 | ≥ 13.1.0, < 13.1.3.2 | ≥ 14.0.0, < 14.0.1.1 | ≥ 14.1.2, < 14.1.2.1 | ≥ 15.0.0, < 15.0.1.1

  • f5•big-iq_centralized_management

    ≥ 5.1.0, ≤ 5.4.0 | ≥ 6.0.0, ≤ 6.1.0

  • f5•enterprise_manager

    3.1.1

  • f5•iworkflow

    2.3.0

  • f5•traffix_signaling_delivery_controller

    ≥ 5.0.0, ≤ 5.1.0

  • linux•linux_kernel

    ≥ 4.4, < 4.4.182 | ≥ 4.9, < 4.9.182 | ≥ 4.14, < 4.14.127 | ≥ 4.19, < 4.19.52 | ≥ 5.1, < 5.1.11

  • redhat•enterprise_linux

    7.0

  • redhat•virtualization_host

    4.0

References (28)