CVE-2018-14663 Other in dnsdist
Remote attackers can bypass DNS firewall filtering by smuggling trailing data as valid records when specific EDNS features are 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-2018-14663?
CVE-2018-14663 is a medium-severity vulnerability in [UNKNOWN] dnsdist, published on 26 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing data such that the addition of a record by dnsdist, for example an OPT record when adding EDNS Client Subnet, might result in the trailing data being smuggled to the backend as a valid record while not seen by dnsdist. This is an issue when dnsdist is deployed as a DNS Firewall and used to filter some records that should not be received by the backend. This issue occurs only when either the 'useClientSubnet' or the experimental 'addXPF' parameters are used when declaring a new backend.
Weakness: CWE-20
Which versions are affected by CVE-2018-14663?
It affects 1 product.
Products include Powerdns Dnsdist.
How do I fix CVE-2018-14663?
Upgrade to a fixed version.
Is CVE-2018-14663 being exploited?
There is no known exploitation of CVE-2018-14663 in the wild and no public exploit code.
Other vulnerabilities in [UNKNOWN] dnsdist
Sources
Also known as DEBIAN-CVE-2018-14663, GHSA-r2j7-9v32-854m, UBUNTU-CVE-2018-14663.