CVE-2020-27721
HIGHF5 BIG-IP DNS and BIG-IP LTM GSLB - Denial of Service in DNS Response Handling
Title source: llmDescription
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.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_misc
https://support.f5.com/csp/article/K52035247
Scores
CVSS v3
7.5
EPSS
0.0065
EPSS Percentile
71.0%
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_domain_name_system
11.6.1 - 11.6.5
f5/big-ip_global_traffic_manager
11.6.1 - 11.6.5
Published
Dec 24, 2020
Tracked Since
Feb 18, 2026