CVE-2020-27717 Denial of service in BIG-IP DNS
Undisclosed DNS requests can cause the Traffic Management Microkernel to restart, resulting in a denial of service for BIG-IP DNS users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-27717?
CVE-2020-27717 is a high-severity denial of service vulnerability in F5 Big-Ip Domain Name System, published on 24 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
On BIG-IP DNS 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.4, and 12.1.0-12.1.5.2, undisclosed series of DNS requests may cause TMM to restart and generate a core file.
Which versions are affected by CVE-2020-27717?
It affects 1 product.
Products include F5 Big-Ip Domain Name System.
How do I fix CVE-2020-27717?
No fix has been published for CVE-2020-27717 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-27717 being exploited?
There is no known exploitation of CVE-2020-27717 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Domain Name System
Sources
Also known as GHSA-r4xm-6p48-p6gf.