CVEvulnerability

CVE-2020-27721

7.5 HIGH Published 2020-12-24 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-12-24
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:N/A:P

Description

In versions 16.0.0-16.0.0.1, 15.1.0-15.1.1, 14.1.0-14.1.3, 13.1.0-13.1.3.5, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, in a BIG-IP DNS / BIG-IP LTM GSLB deployment, under certain circumstances, the BIG-IP DNS system may stop using a BIG-IP LTM virtual server for DNS response.

Affected configurations

• f5 big-ip domain name system (>= 11.6.1 <= 11.6.5) • f5 big-ip domain name system (>= 12.1.0 <= 12.1.5) • f5 big-ip domain name system (>= 13.1.0 <= 13.1.3) • f5 big-ip domain name system (>= 14.1.0 < 14.1.3.1) • f5 big-ip domain name system (>= 15.0.0 < 15.1.2) • f5 big-ip domain name system (>= 16.0.0 < 16.0.1) • f5 big-ip global traffic manager (>= 11.6.1 <= 11.6.5) • f5 big-ip global traffic manager (>= 12.1.0 <= 12.1.5) • f5 big-ip global traffic manager (>= 13.1.0 <= 13.1.3) • f5 big-ip global traffic manager (>= 14.1.0 < 14.1.3.1) • f5 big-ip global traffic manager (>= 15.0.0 < 15.1.2) • f5 big-ip global traffic manager (>= 16.0.0 < 16.0.1)

References