CVE-2021-40083

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).
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 50%
VendorProductVersion
nicknot_resolver
𝑥
< 5.3.2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
knot-resolver
bullseye
5.3.1-1+deb11u1
fixed
buster
not-affected
bookworm
5.6.0-1+deb12u1
fixed
bookworm (security)
5.6.0-1+deb12u1
fixed
sid
5.7.4-2
fixed
trixie
5.7.4-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
knot-resolver
lunar
not-affected
kinetic
not-affected
jammy
not-affected
impish
ignored
hirsute
ignored
focal
not-affected
bionic
not-affected
xenial
not-affected
trusty
dne
Common Weakness Enumeration
References
https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1169
https://gitlab.nic.cz/knot/knot-resolver/-/merge_requests/1169