CVE-2020-25829

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

16/10/2020

Last modified:

15/06/2022

Description

An issue has been found in PowerDNS Recursor before 4.1.18, 4.2.x before 4.2.5, and 4.3.x before 4.3.5. A remote attacker can cause the cached records for a given name to be updated to the Bogus DNSSEC validation state, instead of their actual DNSSEC Secure state, via a DNS ANY query. This results in a denial of service for installation that always validate (dnssec=validate), and for clients requesting validation when on-demand validation is enabled (dnssec=process).

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

Vector 2.0

AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:powerdns:recursor::::::::		4.1.18 (excluding)
cpe:2.3:a:powerdns:recursor::::::::	4.2.0 (including)	4.2.5 (excluding)
cpe:2.3:a:powerdns:recursor::::::::	4.3.0 (including)	4.3.5 (excluding)
cpe:2.3:a:opensuse:backports_sle:15.0:sp1::::::
cpe:2.3:a:opensuse:backports_sle:15.0:sp2::::::
cpe:2.3:o:opensuse:leap:15.1:::::::*
cpe:2.3:o:opensuse:leap:15.2:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2020-25829

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools