PowerDNS Recursor up to 4.1.17/4.2.4/4.3.4 Cached Record denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.8$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in PowerDNS Recursor up to 4.1.17/4.2.4/4.3.4. This vulnerability affects unknown code of the component Cached Record Handler. Performing a manipulation results in denial of service. This vulnerability is cataloged as CVE-2020-25829. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in PowerDNS Recursor up to 4.1.17/4.2.4/4.3.4 (Domain Name Software). This affects some unknown functionality of the component Cached Record Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability.

The weakness was shared 10/16/2020. It is possible to read the advisory at docs.powerdns.com. This vulnerability is uniquely identified as CVE-2020-25829. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 246957 (Linux Distros Unpatched Vulnerability : CVE-2020-25829), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.1.18, 4.2.5 or 4.3.5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (246957). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 246957
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2020-25829

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Recursor 4.1.18/4.2.5/4.3.5

Timelineinfo

09/23/2020 🔍
10/16/2020 +23 days 🔍
10/16/2020 +0 days 🔍
08/10/2025 +1759 days 🔍

Sourcesinfo

Advisory: docs.powerdns.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-25829 (🔍)
GCVE (CVE): GCVE-0-2020-25829
GCVE (VulDB): GCVE-100-162759

Entryinfo

Created: 10/16/2020 13:03
Updated: 08/10/2025 05:32
Changes: 10/16/2020 13:03 (39), 11/19/2020 08:05 (4), 11/20/2020 13:55 (3), 11/20/2020 13:59 (14), 08/10/2025 05:32 (29)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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