7.5
HIGH
CVE-2020-25829
PowerDNS Recursor Bogus DNSSEC Validation State Denial of Service Vulnerability
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).

INFO

Published Date :

Oct. 16, 2020, 6:15 a.m.

Last Modified :

June 15, 2022, 3:15 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2020-25829 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Opensuse leap
2 Opensuse backports_sle
1 Powerdns recursor
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-25829.

URL Resource
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00036.html Third Party Advisory
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.html Vendor Advisory
https://security.gentoo.org/glsa/202012-19 Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-25829 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-25829 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Jun. 15, 2022

    Action Type Old Value New Value
    Changed Reference Type https://security.gentoo.org/glsa/202012-19 No Types Assigned https://security.gentoo.org/glsa/202012-19 Third Party Advisory
  • CVE Modified by [email protected]

    Dec. 23, 2020

    Action Type Old Value New Value
    Added Reference https://security.gentoo.org/glsa/202012-19 [No Types Assigned]
  • Initial Analysis by [email protected]

    Oct. 21, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00036.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00036.html Third Party Advisory
    Changed Reference Type https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.html No Types Assigned https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2020-07.html Vendor Advisory
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* versions up to (excluding) 4.1.18 *cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* versions from (including) 4.2.0 up to (excluding) 4.2.5 *cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* versions from (including) 4.3.0 up to (excluding) 4.3.5
    Added CPE Configuration OR *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:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Oct. 17, 2020

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00036.html [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-25829 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-25829 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.38 }} -0.05%

score

0.73401

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability