CVE-2019-11479 (NVD)

2019-06-19

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.

Products Ubuntu_linux, Big\-Ip_access_policy_manager, Big\-Ip_advanced_firewall_manager, Big\-Ip_analytics, Big\-Ip_application_acceleration_manager, Big\-Ip_application_security_manager, Big\-Ip_domain_name_system, Big\-Ip_edge_gateway, Big\-Ip_fraud_protection_service, Big\-Ip_global_traffic_manager, Big\-Ip_link_controller, Big\-Ip_local_traffic_manager, Big\-Ip_policy_enforcement_manager, Big\-Ip_webaccelerator, Big\-Iq_centralized_management, Enterprise_manager, Iworkflow, Traffix_signaling_delivery_controller, Linux_kernel, Enterprise_linux, Virtualization_host
Type Allocation of Resources Without Limits or Throttling (CWE-770)
First patch - None (likely due to unavailable code)
Patches • https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
• https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5f3e2bf008c2221478101ee72f5cb4654b9fc363
• https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=967c05aee439e6e5d7d805e195b3a20ef5c433d6
Links • https://usn.ubuntu.com/4041-1/
• https://www.oracle.com/security-alerts/cpujan2020.html
• https://www.us-cert.gov/ics/advisories/icsa-19-253-03
• https://support.f5.com/csp/article/K35421172?utm_source=f5support&amp%3Butm_medium=RSS
• https://kc.mcafee.com/corporate/index?page=content&id=SB10287