CVE-2020-27720

HIGH

F5 BIG-IP LTM/CGNAT 13.1.0-13.1.3.5, 14.1.0-14.1.3, 15.1.0-15.1.0.5, 16.0.0-16.0.0.1 - DoS via NAT66 Traffic

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References
Vendor Advisory x_refsource_misc
https://support.f5.com/csp/article/K04048104

Scores

CVSS v3 7.5
EPSS 0.0090
EPSS Percentile 75.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (2)
f5/big-ip_carrier-grade_nat 13.1.0 - 13.1.3
f5/big-ip_local_traffic_manager 13.1.0 - 13.1.3
Published Dec 24, 2020
Tracked Since Feb 18, 2026