CVE-2007-2276
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 · unedited3Com TippingPoint IPS allows remote attackers to cause a denial of service (device hang) via a flood of packets on TCP port 80 with sequentially increasing source ports, related to a "badly written loop." NOTE: the vendor disputes this issue, stating that the product has "performed as expected with no DoS emerging.
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 confidence3Com TippingPoint IPS contains a denial of service vulnerability where flooding TCP port 80 with packets using sequentially increasing source ports causes the device to hang due to a badly written loop in the code. This allows remote attackers to render the IPS device unresponsive.
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 dataall versionsCVSS 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
- None
- Availability
- Complete
AV:N/AC:L/Au:N/C:N/I:N/A:C
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 3Com TippingPoint IPS in your network inventoryReview network device inventory, asset management systems, or physically locate the IPS device. Check device labels, management interfaces, or SNMP sysDescr values for '3Com' and 'TippingPoint' identifiers.Affected if A 3Com TippingPoint IPS device exists in your environment.
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Confirm TCP port 80 is enabled on the IPSAccess the IPS management interface or review its configuration. Check if HTTP management (TCP port 80) or TCP port 80 inspection/policy enforcement is enabled. Use 'show http' or 'show service tcp-80' commands if CLI access is available.Affected if TCP port 80 management or inspection is active on the device.
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Assess network exposure of the IPSReview firewall rules, ACLs, and network topology to determine if the IPS TCP port 80 interface is reachable from untrusted networks. Check if the device has a public IP or is behind inadequate filtering.Affected if The IPS is directly accessible from networks you do not fully trust (including the internet or guest networks).
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Review logs for the attack patternExamine IPS logs for entries showing high volumes of TCP connections from sequential source ports to port 80. Look for patterns like 'source port exhaustion', 'loop hang', or unusual device reset messages occurring during periods of TCP port 80 traffic.Affected if Logs show the device becoming unresponsive during periods of sustained TCP port 80 traffic with sequential source ports.
If you have a 3Com TippingPoint IPS with TCP port 80 enabled and network-accessible to untrusted hosts, you are affected by this vulnerability and should implement network-level rate limiting as the primary detection/prevention method.
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 dataSince the device hangs when processing this specific packet pattern, implement network-level rate limiting or firewall rules to detect and block suspicious sequential port traffic before reaching the IPS. Consider network segmentation to isolate the IPS and contact 3Com for any available firmware updates despite the vendor dispute.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2007-2276 — 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-2007-2276 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
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