CVE-2017-3136 An error handling synthesized records could cause an assertion failure when using DNS64 with "break-dnssec yes;"
An attacker can cause a denial of service in BIND servers by sending crafted queries when DNS64 with break-dnssec is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-3136?
CVE-2017-3136 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 16 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A query with a specific set of characteristics could cause a server using DNS64 to encounter an assertion failure and terminate. An attacker could deliberately construct a query, enabling denial-of-service against a server if it was configured to use the DNS64 feature and other preconditions were met. Affects BIND 9.8.0 -> 9.8.8-P1, 9.9.0 -> 9.9.9-P6, 9.9.10b1->9.9.10rc1, 9.10.0 -> 9.10.4-P6, 9.10.5b1->9.10.5rc1, 9.11.0 -> 9.11.0-P3, 9.11.1b1->9.11.1rc1, 9.9.3-S1 -> 9.9.9-S8.
Weakness: CWE-617
Which versions are affected by CVE-2017-3136?
It affects 11 products.
Products include Debian Debian Linux, Isc Bind, Netapp Data Ontap Edge, Netapp Element Software, Netapp Oncommand Balance, Redhat Enterprise Linux Desktop and 5 more.
How do I fix CVE-2017-3136?
Apply the vendor's patch.
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-2017-3136 being exploited?
There is no known exploitation of CVE-2017-3136 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2017-3136, DEBIAN-CVE-2017-3136, GHSA-835v-j5fw-qqvq, UBUNTU-CVE-2017-3136.