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CVE-2020-5921

HIGHCVSS 7.5/10EPSS 1.04%

Last modified

CVE-2020-5921 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.04% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.04%

59.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
F5Big-Ip Access Policy Manager>= 12.1.0, < 12.1.5.2
F5Big-Ip Access Policy Manager>= 14.1.0, < 14.1.2.7
F5Big-Ip Access Policy Manager>= 15.0.0, < 15.0.1.4
F5Big-Ip Access Policy Manager>= 15.1.0, < 15.1.0.5
F5Big-Ip Advanced Firewall Manager>= 12.1.0, < 12.1.5.2
F5Big-Ip Advanced Firewall Manager>= 14.1.0, < 14.1.2.7
F5Big-Ip Advanced Firewall Manager>= 15.0.0, < 15.0.1.4
F5Big-Ip Advanced Firewall Manager>= 15.1.0, < 15.1.0.5
F5Big-Ip Analytics>= 12.1.0, < 12.1.5.2
F5Big-Ip Analytics>= 14.1.0, < 14.1.2.7
F5Big-Ip Analytics>= 15.0.0, < 15.0.1.4
F5Big-Ip Analytics>= 15.1.0, < 15.1.0.5
F5Big-Ip Application Acceleration Manager>= 12.1.0, < 12.1.5.2
F5Big-Ip Application Acceleration Manager>= 14.1.0, < 14.1.2.7
F5Big-Ip Application Acceleration Manager>= 15.0.0, < 15.0.1.4
F5Big-Ip Application Acceleration Manager>= 15.1.0, < 15.1.0.5
F5Big-Ip Application Security Manager>= 12.1.0, < 12.1.5.2
F5Big-Ip Application Security Manager>= 14.1.0, < 14.1.2.7
F5Big-Ip Application Security Manager>= 15.0.0, < 15.0.1.4
F5Big-Ip Application Security Manager>= 15.1.0, < 15.1.0.5
F5Big-Ip Domain Name System>= 12.1.0, < 12.1.5.2
F5Big-Ip Domain Name System>= 14.1.0, < 14.1.2.7
F5Big-Ip Domain Name System>= 15.0.0, < 15.0.1.4
F5Big-Ip Domain Name System>= 15.1.0, < 15.1.0.5
F5Big-Ip Fraud Protection Service>= 12.1.0, < 12.1.5.2
F5Big-Ip Fraud Protection Service>= 14.1.0, < 14.1.2.7
F5Big-Ip Fraud Protection Service>= 15.0.0, < 15.0.1.4
F5Big-Ip Fraud Protection Service>= 15.1.0, < 15.1.0.5
F5Big-Ip Global Traffic Manager>= 12.1.0, < 12.1.5.2
F5Big-Ip Global Traffic Manager>= 14.1.0, < 14.1.2.7
F5Big-Ip Global Traffic Manager>= 15.0.0, < 15.0.1.4
F5Big-Ip Global Traffic Manager>= 15.1.0, < 15.1.0.5
F5Big-Ip Link Controller>= 12.1.0, < 12.1.5.2
F5Big-Ip Link Controller>= 14.1.0, < 14.1.2.7
F5Big-Ip Link Controller>= 15.0.0, < 15.0.1.4
F5Big-Ip Link Controller>= 15.1.0, < 15.1.0.5
F5Big-Ip Local Traffic Manager>= 12.1.0, < 12.1.5.2
F5Big-Ip Local Traffic Manager>= 14.1.0, < 14.1.2.7
F5Big-Ip Local Traffic Manager>= 15.0.0, < 15.0.1.4
F5Big-Ip Local Traffic Manager>= 15.1.0, < 15.1.0.5
F5Big-Ip Policy Enforcement Manager>= 12.1.0, < 12.1.5.2
F5Big-Ip Policy Enforcement Manager>= 14.1.0, < 14.1.2.7
F5Big-Ip Policy Enforcement Manager>= 15.0.0, < 15.0.1.4
F5Big-Ip Policy Enforcement Manager>= 15.1.0, < 15.1.0.5

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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 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.
How severe is CVE-2020-5921?
CVE-2020-5921 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.04% probability of exploitation in the next 30 days.
How do I fix CVE-2020-5921?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-5921?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST