CVE-2001-1018
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 · uneditedLotus Domino web server 5.08 allows remote attackers to determine the internal IP address of the server when NAT is enabled via a GET request that contains a long sequence of / (slash) characters.
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 confidenceLotus Domino web server 5.08 contains an information disclosure vulnerability when Network Address Translation (NAT) is enabled. Remote attackers can determine the internal IP address of the server by sending a GET request containing an unusually long sequence of slash (/) characters, causing the server to reveal internal network configuration details.
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= 5.0.8CVSS 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
- Partial
- Integrity
- None
- Availability
- None
AV:N/AC:L/Au:N/C:P/I:N/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 the installed Lotus Domino versionRun 'lsof -i :80' or check the Domino server documentation/about screen to confirm the exact version number installedAffected if The version is exactly 5.0.8 (or any 5.x version reported as vulnerable)
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Verify if NAT is enabled on the serverCheck the Domino server's network configuration settings, specifically look for NAT/Network Address Translation settings in the server's network configuration or firewall settingsAffected if NAT is enabled and the Domino web server is accessible through a NAT gateway
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Confirm the Domino HTTP task is runningRun 'show task' in Domino console or check the server's task list to verify the HTTP task is active and listening on external interfacesAffected if The HTTP task is running and bound to external/network-facing IP addresses
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Test for the vulnerability conditionSend a GET request to the web server with an unusually long sequence of slashes (e.g., GET ///////////////////////// HTTP/1.1) and observe if internal IP addresses or network configuration details are returned in the responseAffected if The server responds with internal IP addresses or NAT-related network configuration information
You are affected if running Lotus Domino version 5.0.8 with NAT enabled and the HTTP task exposed externally, where a crafted GET request with excessive slashes reveals internal network details.
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 to a patched version of Lotus Domino or apply vendor-provided patches. If upgrading is not feasible, review and properly configure the web server's NAT handling and consider implementing network-level filtering to prevent malicious requests from reaching the server.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2001-1018 — 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-2001-1018 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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