CVE-2023-4408

Parsing large DNS messages may cause excessive CPU load

High · published February 13, 2024

CVSS v3.1
7.5
EPSS
1%
Percentile
72.0
In the wild
Unconfirmed
What it is

The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by exploiting this flaw. This issue affects both authoritative servers and recursive resolvers.

This issue affects BIND 9 versions 9.0.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01387 · 72.0th percentile
Published
2024-02-13T14:04Z
EPSS history
Timeline
  • 13 FEB 14:04Z
    Parsing large DNS messages may cause excessive CPU load
    cvelistv5