CVE-2020-27720

Published: Dec 24, 2020Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

On BIG-IP LTM/CGNAT version 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, and 13.1.0-13.1.3.5, when processing NAT66 traffic with Port Block Allocation (PBA) mode and SP-DAG enabled, and dag-ipv6-prefix-len configured with a value less than the default of 128, an undisclosed traffic pattern may cause the Traffic Management Microkernel (TMM) to restart.

Affected (8)

Products: F5: Big Ip Carrier Grade Nat, Big Ip Local Traffic Manager

2 products

Big Ip Carrier Grade Nat

Big Ip Local Traffic Manager

Configuration A

8 vulnerable

Vulnerable Software	Affected Versions
F5 Big Ip Carrier Grade Nat	13.1.0 ≤ version ≤ 13.1.3
F5 Big Ip Carrier Grade Nat	14.1.0 ≤ version < 14.1.3.1
F5 Big Ip Carrier Grade Nat	15.1.0 ≤ version < 15.1.1
F5 Big Ip Carrier Grade Nat	16.0.0 ≤ version < 16.0.1
F5 Big Ip Local Traffic Manager	13.1.0 ≤ version ≤ 13.1.3
F5 Big Ip Local Traffic Manager	14.1.0 ≤ version < 14.1.3.1
F5 Big Ip Local Traffic Manager	15.1.0 ≤ version < 15.1.1
F5 Big Ip Local Traffic Manager	16.0.0 ≤ version < 16.0.1

References (2)

https://support.f5.com/csp/article/K04048104

Source: f5sirt@f5.com

Vendor Advisory

https://support.f5.com/csp/article/K04048104

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.