CVE-2020-12667
Fixed in a distro release EPSS 3%CVSS 7.5
Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.
Products: nic knot_resolver
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 10 | knot-resolver | 3.2.1-3+deb10u2 |
| Debian 12 | knot-resolver | 5.1.1-0.1 |
| Debian 13 | knot-resolver | 5.1.1-0.1 |
| Debian 14 | knot-resolver | 5.1.1-0.1 |
| Ubuntu 20.04 LTS | knot-resolver | 3.2.1-3ubuntu2.2 |
| Ubuntu Pro 16.04 LTS | knot-resolver | no fix |
| Ubuntu Pro 18.04 LTS | knot-resolver | no fix |