CVE-2023-28457
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 was discovered in Technitium through 11.0.3. It enables attackers to conduct a DNS cache poisoning attack and inject fake responses within 1 second, which is impactful.
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 versions through 11.0.3 contain a vulnerability that allows attackers to conduct DNS cache poisoning attacks. The critical aspect is that the attack can succeed within just 1 second, indicating a fundamental weakness in the server's transaction ID handling or response validation that makes spoofing DNS responses trivially easy for attackers.
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<= 11.0.3CVSS 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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Identify Technitium DNS Server versionCheck the installed version via the DNS server admin web interface (typically port 5380) or by checking the application binary/package versionAffected if The installed version is 11.0.3 or any lower version (11.0.0 through 11.0.3)
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Confirm DNS server service is runningVerify the Technitium DNS Server service or process is active and listening on DNS port 53 (TCP/UDP)Affected if The DNS server is running and actively serving DNS queries; the vulnerability only applies when the server is operational
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Verify DNS caching is enabledCheck the DNS server configuration settings through the admin web interface or configuration files to confirm caching is enabledAffected if DNS caching is enabled - cache poisoning requires the server to cache responses for the attack to succeed
You are affected if your Technitium DNS Server version is 11.0.3 or lower, the DNS server service is running, and DNS caching is enabled.
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.
dbcve · scopedUpgrade Technitium DNS Server to a version beyond 11.0.3 that addresses the cache poisoning vulnerability. Implement source port randomization and proper transaction ID validation if not already present.
Upgrade to Technitium DNS Server version 11.1.0 or later
- 1. Back up your current Technitium DNS Server configuration and data.
- 2. Download the latest version of Technitium DNS Server from the official GitHub releases page (github.com/TechnitiumSoftware/DnsServer) or the official website.
- 3. Install the new version (11.1.0 or later) following the standard upgrade procedure.
- 4. Verify the DNS server is running correctly after upgrade.
- 5. Test DNS resolution functionality to ensure normal operation.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-28457 — 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-2023-28457 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data