CVE-2020-12667
7.5
HIGH
CVSS 3.1
EPSS 1.0%
Description
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.
How to fix CVE-2020-12667
To remediate CVE-2020-12667, upgrade the affected package to a fixed version below.
- Debian/knot-resolver—upgrade to 5.1.1-0.1 or later
Is CVE-2020-12667 being exploited?
Low — EPSS is 1.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 5.1.1-0.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |