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CVE-2020-5876

HIGHCVSS 8.1/10EPSS 0.57%

Last modified

CVE-2020-5876 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. On BIG-IP 15.0.0-15.0.1.3, 14.1.0-14.1.2.3, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, a race condition exists where mcpd and other processes may make unencrypted connection attempts to a new configuration sync peer. The race condition can occur when changing the ConfigSync IP address of a peer, adding a new peer, or when the Traffic Management Microkernel (TMM) first starts up.. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

Description

On BIG-IP 15.0.0-15.0.1.3, 14.1.0-14.1.2.3, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, a race condition exists where mcpd and other processes may make unencrypted connection attempts to a new configuration sync peer. The race condition can occur when changing the ConfigSync IP address of a peer, adding a new peer, or when the Traffic Management Microkernel (TMM) first starts up.

Metrics

CVSS 3.1
8.1/10

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

EPSS Probability
0.57%

42.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
F5Big-Ip Access Policy Manager>= 11.6.1, <= 11.6.5.1
F5Big-Ip Access Policy Manager>= 12.1.0, <= 12.1.5.1
F5Big-Ip Access Policy Manager>= 13.1.0, <= 13.1.3.3
F5Big-Ip Access Policy Manager>= 14.1.0, <= 14.1.2.3
F5Big-Ip Access Policy Manager>= 15.0.0, <= 15.1.0.3
F5Big-Ip Advanced Firewall Manager>= 11.6.1, <= 11.6.5.1
F5Big-Ip Advanced Firewall Manager>= 12.1.0, <= 12.1.5.1
F5Big-Ip Advanced Firewall Manager>= 13.1.0, <= 13.1.3.3
F5Big-Ip Advanced Firewall Manager>= 14.1.0, <= 14.1.2.3
F5Big-Ip Advanced Firewall Manager>= 15.0.0, <= 15.1.0.3
F5Big-Ip Analytics>= 11.6.1, <= 11.6.5.1
F5Big-Ip Analytics>= 12.1.0, <= 12.1.5.1
F5Big-Ip Analytics>= 13.1.0, <= 13.1.3.3
F5Big-Ip Analytics>= 14.1.0, <= 14.1.2.3
F5Big-Ip Analytics>= 15.0.0, <= 15.1.0.3
F5Big-Ip Application Acceleration Manager>= 11.6.1, <= 11.6.5.1
F5Big-Ip Application Acceleration Manager>= 12.1.0, <= 12.1.5.1
F5Big-Ip Application Acceleration Manager>= 13.1.0, <= 13.1.3.3
F5Big-Ip Application Acceleration Manager>= 14.1.0, <= 14.1.2.3
F5Big-Ip Application Acceleration Manager>= 15.0.0, <= 15.1.0.3
F5Big-Ip Application Security Manager>= 11.6.1, <= 11.6.5.1
F5Big-Ip Application Security Manager>= 12.1.0, <= 12.1.5.1
F5Big-Ip Application Security Manager>= 13.1.0, <= 13.1.3.3
F5Big-Ip Application Security Manager>= 14.1.0, <= 14.1.2.3
F5Big-Ip Application Security Manager>= 15.0.0, <= 15.1.0.3
F5Big-Ip Domain Name System>= 11.6.1, <= 11.6.5.1
F5Big-Ip Domain Name System>= 12.1.0, <= 12.1.5.1
F5Big-Ip Domain Name System>= 13.1.0, <= 13.1.3.3
F5Big-Ip Domain Name System>= 14.1.0, <= 14.1.2.3
F5Big-Ip Domain Name System>= 15.0.0, <= 15.1.0.3
F5Big-Ip Fraud Protection Service>= 11.6.1, <= 11.6.5.1
F5Big-Ip Fraud Protection Service>= 12.1.0, <= 12.1.5.1
F5Big-Ip Fraud Protection Service>= 13.1.0, <= 13.1.3.3
F5Big-Ip Fraud Protection Service>= 14.1.0, <= 14.1.2.3
F5Big-Ip Fraud Protection Service>= 15.0.0, <= 15.1.0.3
F5Big-Ip Global Traffic Manager>= 11.6.1, <= 11.6.5.1
F5Big-Ip Global Traffic Manager>= 12.1.0, <= 12.1.5.1
F5Big-Ip Global Traffic Manager>= 13.1.0, <= 13.1.3.3
F5Big-Ip Global Traffic Manager>= 14.1.0, <= 14.1.2.3
F5Big-Ip Global Traffic Manager>= 15.0.0, <= 15.1.0.3
F5Big-Ip Link Controller>= 11.6.1, <= 11.6.5.1
F5Big-Ip Link Controller>= 12.1.0, <= 12.1.5.1
F5Big-Ip Link Controller>= 13.1.0, <= 13.1.3.3
F5Big-Ip Link Controller>= 14.1.0, <= 14.1.2.3
F5Big-Ip Link Controller>= 15.0.0, <= 15.1.0.3
F5Big-Ip Local Traffic Manager>= 11.6.1, <= 11.6.5.1
F5Big-Ip Local Traffic Manager>= 12.1.0, <= 12.1.5.1
F5Big-Ip Local Traffic Manager>= 13.1.0, <= 13.1.3.3
F5Big-Ip Local Traffic Manager>= 14.1.0, <= 14.1.2.3
F5Big-Ip Local Traffic Manager>= 15.0.0, <= 15.1.0.3

Showing 50 of 55 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-5876?
On BIG-IP 15.0.0-15.0.1.3, 14.1.0-14.1.2.3, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, a race condition exists where mcpd and other processes may make unencrypted connection attempts to a new configuration sync peer. The race condition can occur when changing the ConfigSync IP address of a peer, adding a new peer, or when the Traffic Management Microkernel (TMM) first starts up.
How severe is CVE-2020-5876?
CVE-2020-5876 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.
How do I fix CVE-2020-5876?
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-2020-5876?

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

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Source: NVD / NIST