CVE-2020-27721 : 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

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.

Published 2020-12-24 15:15:13

Updated 2020-12-28 18:42:35

Source F5 Networks

View at NVD, CVE.org

Products affected by CVE-2020-27721

F5 » Big-ip Global Traffic Manager
Versions from including (>=) 15.0.0 and before (<) 15.1.2
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Global Traffic Manager
Versions from including (>=) 14.1.0 and before (<) 14.1.3.1
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Global Traffic Manager
Versions from including (>=) 11.6.1 and up to, including, (<=) 11.6.5
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Global Traffic Manager
Versions from including (>=) 12.1.0 and up to, including, (<=) 12.1.5
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Global Traffic Manager
Versions from including (>=) 16.0.0 and before (<) 16.0.1
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Global Traffic Manager
Versions from including (>=) 13.1.0 and up to, including, (<=) 13.1.3
cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Domain Name System
Versions from including (>=) 15.0.0 and before (<) 15.1.2
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Domain Name System
Versions from including (>=) 12.1.0 and up to, including, (<=) 12.1.5
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Domain Name System
Versions from including (>=) 11.6.1 and up to, including, (<=) 11.6.5
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Domain Name System
Versions from including (>=) 14.1.0 and before (<) 14.1.3.1
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Domain Name System
Versions from including (>=) 13.1.0 and up to, including, (<=) 13.1.3
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
Matching versions
F5 » Big-ip Domain Name System
Versions from including (>=) 16.0.0 and before (<) 16.0.1
cpe:2.3:a:f5:big-ip_domain_name_system:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2020-27721

EPSS FAQ

0.65%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 68 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-27721

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.3	MEDIUM	AV:N/AC:M/Au:N/C:N/I:N/A:P	8.6	2.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

References for CVE-2020-27721

https://support.f5.com/csp/article/K52035247

Article: K52035247 - BIG-IP DNS virtual server vulnerability CVE-2020-27721
Vendor Advisory

Jump to

Vulnerability Details : CVE-2020-27721

Products affected by CVE-2020-27721

Exploit prediction scoring system (EPSS) score for CVE-2020-27721

CVSS scores for CVE-2020-27721

References for CVE-2020-27721