High severity · published Dec 24, 2020
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, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, in a BIG-IP DNS / BIG-IP LTM GSLB deployment, under certain…
7.5
CVSS
1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BD
Big-ip Domain Name System · F5
11.6.1 through 11.6.5; 12.1.0 through 12.1.5; 13.1.0 through 13.1.3; 14.1.0 before 14.1.3.1; 15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
BG
Big-ip Global Traffic Manager · F5
11.6.1 through 11.6.5; 12.1.0 through 12.1.5; 13.1.0 through 13.1.3; 14.1.0 before 14.1.3.1; 15.0.0 before 15.1.2; 16.0.0 before 16.0.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27721
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27721
Vendor Advisory
https://support.f5.com/csp/article/K52035247
More from Big-ip Domain Name System
9.8
CVE-2023-46747
BIG-IP Configuration utility unauthenticated remote code execution vulnerability
9.8
CVE-2022-1388
F5 BIG-IP Missing Authentication Vulnerability
9.8
CVE-2021-22991
F5 BIG-IP Traffic Management Microkernel Buffer Overflow
9.8
CVE-2021-22986
F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution Vulnerability
9.8
CVE-2020-5902
F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerability