CVE-2020-5921: in BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.6, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.2, Syn flood causes large number of…

PriorityP339high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

1.04%

60.3th percentile

in BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.6, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.2, Syn flood causes large number of MCPD context messages destined to secondary blades consuming memory leading to MCPD failure. This issue affects only VIPRION hosts with two or more blades installed. Single-blade VIPRION hosts are not affected.

Affected

56 ranges· showing 25

Vendor	Product	Version range	Fixed in
f5	big-ip_aam	—	—
f5	big-ip_access_policy_manager	—	—
f5	big-ip_access_policy_manager	>= 12.1.0 < 12.1.5.2	12.1.5.2
f5	big-ip_access_policy_manager	>= 14.1.0 < 14.1.2.7	14.1.2.7
f5	big-ip_access_policy_manager	>= 15.0.0 < 15.0.1.4	15.0.1.4
f5	big-ip_access_policy_manager	>= 15.1.0 < 15.1.0.5	15.1.0.5
f5	big-ip_advanced_firewall_manager	>= 12.1.0 < 12.1.5.2	12.1.5.2
f5	big-ip_advanced_firewall_manager	>= 14.1.0 < 14.1.2.7	14.1.2.7
f5	big-ip_advanced_firewall_manager	>= 15.0.0 < 15.0.1.4	15.0.1.4
f5	big-ip_advanced_firewall_manager	>= 15.1.0 < 15.1.0.5	15.1.0.5
f5	big-ip_afm	—	—
f5	big-ip_analytics	—	—
f5	big-ip_analytics	>= 12.1.0 < 12.1.5.2	12.1.5.2
f5	big-ip_analytics	>= 14.1.0 < 14.1.2.7	14.1.2.7
f5	big-ip_analytics	>= 15.0.0 < 15.0.1.4	15.0.1.4
f5	big-ip_analytics	>= 15.1.0 < 15.1.0.5	15.1.0.5
f5	big-ip_apm	—	—
f5	big-ip_application_acceleration_manager	>= 12.1.0 < 12.1.5.2	12.1.5.2
f5	big-ip_application_acceleration_manager	>= 14.1.0 < 14.1.2.7	14.1.2.7
f5	big-ip_application_acceleration_manager	>= 15.0.0 < 15.0.1.4	15.0.1.4
f5	big-ip_application_acceleration_manager	>= 15.1.0 < 15.1.0.5	15.1.0.5
f5	big-ip_application_security_manager	>= 12.1.0 < 12.1.5.2	12.1.5.2
f5	big-ip_application_security_manager	>= 14.1.0 < 14.1.2.7	14.1.2.7
f5	big-ip_application_security_manager	>= 15.0.0 < 15.0.1.4	15.0.1.4
f5	big-ip_application_security_manager	>= 15.1.0 < 15.1.0.5	15.1.0.5

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.