CVE-2022-32983Network attack vector

DNS cache poisoning via decoupled forwarding filters

Published Jun 20, 2022 · Updated Aug 3, 2024

DNS cache poisoning in Knot Resolver 5.5.1 and earlier allows remote attackers controlling a configured forwarder to inject DNS records. The policy module filters only the original client request, while its forwarding action sends related subqueries to the same forwarder and caches arbitrary returned records. Exploitation requires a filtered forwarding rule and a malicious or compromised forwarder; records protected by DNSSEC validation remain unaffected.

CVSS severity5.3
Medium
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DNS cache poisoning in Knot Resolver 5.5.1 and earlier allows remote attackers controlling a configured forwarder to inject DNS records. The policy module filters only the original client request, while its forwarding action sends related subqueries to the same forwarder and caches arbitrary returned records. Exploitation requires a filtered forwarding rule and a malicious or compromised forwarder; records protected by DNSSEC validation remain unaffected.

The record

CVE
CVE-2022-32983
Published
Jun 20, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-290, T1565.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1565.002Transmitted Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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