CVE-2019-19331CWE-407

knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization

High · published December 16, 2019

CVSS v3.0
7.5
EPSS
2%
Percentile
81.5
In the wild
Unconfirmed
What it is

knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).

The record
Technical detail
CVSS v3.0
7.5 · HIGH
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.02107 · 81.5th percentile
Weakness
CWE-407 · Inefficient Algorithmic Complexity
Published
2019-12-16T00:00Z
EPSS history
Timeline
  • 16 DEC 00:00Z
    knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization
    cvelistv5