CVE-2020-8621

Attempting QNAME minimization after forwarding can lead to an assertion failure in resolver.c

High · published August 21, 2020

CVSS v3.1
7.5
EPSS
3%
Percentile
87.1
In the wild
Unconfirmed
What it is

In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected.

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
0.02968 · 87.1th percentile
Published
2020-08-21T20:50Z
EPSS history
Timeline
  • 21 AUG 20:50Z
    Attempting QNAME minimization after forwarding can lead to an assertion failure in resolver.c
    cvelistv5