CVE-2018-5736 Denial of service in n/a
An attacker can cause a denial of service in BIND by triggering an assertion failure through rapid zone transfers, crashing the named process.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-5736?
CVE-2018-5736 is a medium-severity denial of service vulnerability in Isc Bind, published on 16 Jan 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An error in zone database reference counting can lead to an assertion failure if a server which is running an affected version of BIND attempts several transfers of a slave zone in quick succession. This defect could be deliberately exercised by an attacker who is permitted to cause a vulnerable server to initiate zone transfers (for example: by sending valid NOTIFY messages), causing the named process to exit after failing the assertion test. Affects BIND 9.12.0 and 9.12.1.
Weakness: CWE-617
Which versions are affected by CVE-2018-5736?
It affects 3 products.
Products include Isc Bind, Netapp Cloud Backup, Netapp Data Ontap Edge.
How do I fix CVE-2018-5736?
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-2018-5736 being exploited?
There is no known exploitation of CVE-2018-5736 in the wild and no public exploit code.
Other vulnerabilities in Isc Bind
Sources
Also known as ALPINE-CVE-2018-5736, GHSA-6p6q-g6w7-h5f9.