SB2020121726 - Denial of service in F5 BIG-IP DNS
Published: December 17, 2020
Security Bulletin ID
SB2020121726
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2020-27717)
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 update from vendor's website.