#VU49070 Input validation error in BIG-IP DNS - CVE-2020-27717
Published: December 17, 2020
Vulnerability identifier: #VU49070
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-27717
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
BIG-IP DNS
BIG-IP DNS
Software vendor:
F5 Networks
F5 Networks
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when processing DNS traffic. A remote attacker can pass specially crafted DNS requests to the system and perform a denial of service (DoS) attack.
The affected BIG-IP system temporarily fails to process traffic as it recovers from a Traffic Management Microkernel (TMM) restart, and devices configured in a device group may fail over.
Remediation
Install updates from vendor's website.