CVE-2020-27725 Denial of service in BIG-IP DNS, GTM, and Link Controller
Authenticated users can cause memory leaks in BIG-IP DNS, GTM, and Link Controller by listing DNS zones, potentially leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-27725?
CVE-2020-27725 is a medium-severity denial of service vulnerability in F5 Big-Ip Domain Name System, published on 24 Dec 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In version 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2 of BIG-IP DNS, GTM, and Link Controller, zxfrd leaks memory when listing DNS zones. Zones can be listed via TMSH, iControl or SNMP; only users with access to those services can trigger this vulnerability.
Weakness: CWE-401
Which versions are affected by CVE-2020-27725?
It affects 3 products.
Products include F5 Big-Ip Domain Name System, F5 Big-Ip Global Traffic Manager, F5 Big-Ip Link Controller.
How do I fix CVE-2020-27725?
No fix has been published for CVE-2020-27725 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-2020-27725 being exploited?
There is no known exploitation of CVE-2020-27725 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Domain Name System
Sources
Also known as GHSA-3f89-7rr5-pcr2.