CVE-2019-6465 Zone transfer controls for writable DLZ zones were not effective
Attackers can bypass zone transfer restrictions on writable Dynamically Loadable Zones in BIND, potentially exposing sensitive DNS data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-6465?
CVE-2019-6465 is a medium-severity missing authorization 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
Controls for zone transfers may not be properly applied to Dynamically Loadable Zones (DLZs) if the zones are writable Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.5-P2, 9.12.0 -> 9.12.3-P2, and versions 9.9.3-S1 -> 9.11.5-S3 of BIND 9 Supported Preview Edition. Versions 9.13.0 -> 9.13.6 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2019-6465.
Weakness: CWE-732
Which versions are affected by CVE-2019-6465?
It affects 2 products.
Products include Isc Bind, Redhat Enterprise Linux.
How do I fix CVE-2019-6465?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2019-6465 being exploited?
There is no known exploitation of CVE-2019-6465 in the wild and no public exploit code.
Other vulnerabilities in Isc Bind
Sources
Also known as ALPINE-CVE-2019-6465, DEBIAN-CVE-2019-6465, GHSA-5hgv-gr6q-xvqx, UBUNTU-CVE-2019-6465.