CVE-2024-4076 Assertion failure when serving both stale cache data and authoritative zone content
An attacker can cause a denial of service in BIND by triggering an assertion failure when serving stale cache data alongside authoritative zone content.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-4076?
CVE-2024-4076 is a high-severity denial of service vulnerability in ISC BIND 9, published on 23 Jul 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Client queries that trigger serving stale data and that also require lookups in local authoritative zone data may result in an assertion failure. This issue affects BIND 9 versions 9.16.13 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.11.33-S1 through 9.11.37-S1, 9.16.13-S1 through 9.16.50-S1, and 9.18.11-S1 through 9.18.27-S1.
Weakness: CWE-617
Which versions are affected by CVE-2024-4076?
How do I fix CVE-2024-4076?
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-2024-4076 being exploited?
There is no known exploitation of CVE-2024-4076 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2024-4076, AZL-46966, AZL-46984, BELL-CVE-2024-4076, DEBIAN-CVE-2024-4076, GHSA-gfw8-mh94-9w58 and 1 more.