CVE-2012-2606
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 · uneditedThe agent in Bradford Network Sentry before 5.3.3 does not require authentication for messages, which allows remote attackers to trigger the display of arbitrary text on a workstation via a crafted packet to UDP port 4567, as demonstrated by a replay 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 · high confidenceThe Bradford Network Sentry agent before version 5.3.3 lacks authentication on its UDP-based messaging protocol (port 4567). Remote attackers can send unauthenticated crafted UDP packets to cause arbitrary text to be displayed on workstations, as demonstrated by a simple replay attack.
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<= 5.3= ns500rx= ns500xCVSS 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
- Authentication
- None
- Confidentiality
- None
- Integrity
- Partial
- Availability
- None
AV:N/AC:L/Au:N/C:N/I:P/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 Bradford Network Sentry installationLocate the Network Sentry agent or appliance in your environment. Check for installed software named 'Bradford Network Sentry' or 'Network Sentry' on systems or network appliances.Affected if The software is present and no version can be determined or version is <= 5.3
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Determine installed versionOn the appliance or system running Network Sentry, check the software version. This is typically accessible via the appliance management interface, or by running 'rpm -q' or 'dpkg -l' for the package named 'networksentry' or similar on the host OS.Affected if The installed version is 5.3 or earlier, or version cannot be determined (implies vulnerable)
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Verify UDP port 4567 is listeningRun 'netstat -anp | grep 4567' or 'ss -anp | grep 4567' on the host running Network Sentry to check if UDP port 4567 is open and listening.Affected if UDP port 4567 is bound to a service (indicates the vulnerable protocol is active)
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Confirm network exposure of port 4567From an external system or from outside the internal network, attempt to reach UDP port 4567 on the Network Sentry host using 'nc -uv <target> 4567' or by checking firewall rules with 'iptables -L' or equivalent.Affected if UDP port 4567 is accessible from untrusted networks or the port responds to external UDP probes
A user is affected if Bradford Network Sentry version 5.3 or earlier is installed and UDP port 4567 is open and accessible on the network.
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 Bradford Network Sentry to version 5.3.3 or later which implements proper message authentication. Alternatively, block UDP port 4567 at network perimeter firewalls to prevent external injection of messages.
- Consultation4.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-2606 — 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-2012-2606 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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