CVE-2020-27720 — F5 Big-ip Local Traffic Manager vulnerability

4 documents4 sources
Severity
7.5HIGHNVD
EPSS
0.9%
top 24.35%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
F5 Big-ip Carrier-grade NATF5 Big-ip Local Traffic ManagerBig-ip LTM Cgnat
Timeline
PublishedDec 24
Latest updateMay 24

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶NVDf5/big-ip_local_traffic_manager14.1.0 — 14.1.3.1+3
▶CVEListV5big-ip_ltm/cgnat16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.5
▶NVDf5/big-ip_carrier-grade_nat14.1.0 — 14.1.3.1+3

🔴Vulnerability Details

2
GHSA
GHSA-hp39-4vrr-9cjg: On BIG-IP LTM/CGNAT version 16↗2022-05-24
▶
CVEList
CVE-2020-27720: On BIG-IP LTM/CGNAT version 16↗2020-12-24
▶

📋Vendor Advisories

1
F5
CVE-2020-27720: On BIG-IP LTM/CGNAT version 16↗2020-12-24
▶
CVE-2020-27720 — F5 vulnerability | cvebase