CVE-2024-56089
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn issue in Technitium through v13.2.2 enables attackers to conduct a DNS cache poisoning attack and inject fake responses by reviving the birthday attack.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceTechnitium DNS Server through v13.2.2 contains a vulnerability that allows attackers to conduct DNS cache poisoning by reviving the birthday attack technique. This attack exploits the predictability of DNS transaction IDs, enabling attackers to inject fraudulent DNS responses into the server's cache and redirect traffic to malicious destinations.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 13.2.2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify Technitium DNS Server is runningCheck if the DNS server process is active. On Windows, open Task Manager and look for 'DnsServer.exe' or check Services for 'Technitium DNS Server'. On Linux, run 'systemctl status technitium-dns' or check for the running process.Affected if The server process is running and processing DNS queries
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Identify the installed versionAccess the DNS server web console (default http://localhost:5380) and check the version displayed on the dashboard or in About section. Alternatively, check the executable properties: right-click DnsServer.exe > Properties > Details > File Version.Affected if Version displayed is 13.2.2 or lower
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Confirm version is within affected rangeCompare the identified version number against the affected range: any version from initial release up to and including 13.2.2 is vulnerable.Affected if Installed version is <= 13.2.2
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Verify DNS service is accessibleAttempt to resolve a test domain using the server: run 'nslookup test.example.com 127.0.0.1' or dig '@127.0.0.1 test.example.com' to confirm the DNS service is actively listening and processing queries.Affected if DNS queries succeed against localhost, confirming the service is active
If Technitium DNS Server is running with version 13.2.2 or lower and actively processing DNS queries, the environment is vulnerable to CVE-2024-56089 cache poisoning attacks.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade Technitium to the latest version (v13.2.3 or later) which addresses the transaction ID randomization. If immediate patching is not possible, consider implementing DNSsec validation as an additional layer of protection against cache poisoning.
- Consultation2.0 h
- Implementation1.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-56089 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-56089 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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