CVE-2023-5680 Cleaning an ECS-enabled cache may cause excessive CPU load
Attackers can cause excessive CPU load and impair query performance in BIND 9 by exploiting ECS cache cleaning mechanisms.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-5680?
CVE-2023-5680 is a medium-severity denial of service vulnerability in Isc Bind, published on 13 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
If a resolver cache has a very large number of ECS records stored for the same name, the process of cleaning the cache database node for this name can significantly impair query performance. This issue affects BIND 9 versions 9.11.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.
Which versions are affected by CVE-2023-5680?
It affects 2 products.
Products include Isc Bind, Netapp Active Iq Unified Manager.
How do I fix CVE-2023-5680?
Upgrade to a fixed version.
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-2023-5680 being exploited?
There is no known exploitation of CVE-2023-5680 in the wild and no public exploit code.
Other vulnerabilities in Isc Bind
Sources
Also known as ALPINE-CVE-2023-5680, GHSA-m868-f948-vvjc.