CVE-2019-6469 BIND Supported Preview Edition can exit with an assertion failure if ECS is in use
Attackers can cause a denial of service in BIND Supported Preview Edition by triggering an assertion failure via malformed RRSIGs when EDNS Client Subnet 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-2019-6469?
CVE-2019-6469 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
An error in the EDNS Client Subnet (ECS) feature for recursive resolvers can cause BIND to exit with an assertion failure when processing a response that has malformed RRSIGs. Versions affected: BIND 9.10.5-S1 -> 9.11.6-S1 of BIND 9 Supported Preview Edition.
Weakness: CWE-617
Which versions are affected by CVE-2019-6469?
It affects 1 product.
Products include Isc Bind.
How do I fix CVE-2019-6469?
No fix has been published for CVE-2019-6469 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-2019-6469 being exploited?
There is no known exploitation of CVE-2019-6469 in the wild and no public exploit code.
Other vulnerabilities in Isc Bind
Sources
Also known as GHSA-qxvj-gg4r-8gwm.