CVE-2021-40083
7.5
HIGH
CVSS 3.1
EPSS 0.84%
Description
Knot Resolver before 5.3.2 is prone to an assertion failure, triggerable by a remote attacker in an edge case (NSEC3 with too many iterations used for a positive wildcard proof).
How to fix CVE-2021-40083
To remediate CVE-2021-40083, upgrade the affected package to a fixed version below.
- Debian/knot-resolver—upgrade to 5.3.1-1+deb11u1 or later
Is CVE-2021-40083 being exploited?
Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 5.3.1-1+deb11u1
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 |