CVE-2019-6468 BIND Supported Preview Edition can exit with an assertion failure if nxdomain-redirect is used

Medium 5.3 Published 9 Oct 2019 Updated 16 Sep 2024

Attackers can cause a denial of service in BIND Supported Preview Edition by triggering an assertion failure when nxdomain-redirect is enabled.

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-2019-6468?

CVE-2019-6468 is a medium-severity denial of service vulnerability in Isc Bind, published on 9 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In BIND Supported Preview Edition, an error in the nxdomain-redirect feature can occur in versions which support EDNS Client Subnet (ECS) features. In those versions which have ECS support, enabling nxdomain-redirect is likely to lead to BIND exiting due to assertion failure. Versions affected: BIND Supported Preview Edition version 9.10.5-S1 -> 9.11.5-S5. ONLY BIND Supported Preview Edition releases are affected.

Weakness: CWE-617

Which versions are affected by CVE-2019-6468?

It affects 1 product.

Products include Isc Bind.

How do I fix CVE-2019-6468?

No fix has been published for CVE-2019-6468 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-2019-6468 being exploited?

There is no known exploitation of CVE-2019-6468 in the wild and no public exploit code.

All Isc Bind vulnerabilities

Sources

Also known as GHSA-6r46-vvmw-c9mc.