MetaframeApplication · Citrix
CVE-2001-0908
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 · uneditedCITRIX Metaframe 1.8 logs the Client Address (IP address) that is provided by the client instead of obtaining it from the packet headers, which allows clients to spoof their public IP address, e.g. through Network Address Translation (NAT).
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 confidenceCITRIX Metaframe 1.8 logs the client-supplied IP address instead of extracting it from network packet headers, allowing clients to spoof their IP address (e.g., through NAT). This creates a trust boundary issue where the application accepts unvalidated input for security-relevant logging.
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
MetaframeApplication
= 1.8CVSS 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
- Partial
- Availability
- Partial
AV:N/AC:L/Au:N/C:P/I:P/A:P
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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Confirm Citrix Metaframe versionCheck installed version of Citrix Metaframe using system information tools, program listings, or registry entries if applicableAffected if Version is exactly 1.8
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Examine logging configuration for IP capture methodReview configuration files or settings that control how client IP addresses are recorded in logsAffected if Configuration shows IP address is obtained from client-supplied input rather than network packet headers
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Inspect application log filesOpen Citrix Metaframe log files and verify how client IP addresses are recordedAffected if Logged IP addresses reflect client-submitted values (e.g., from HTTP headers) instead of actual connection source IP
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Check for proxy or NAT handling configurationLook for configuration related to proxy handling, NAT traversal, or client IP header processingAffected if Application is configured to trust or log client-provided IP values through headers or other user-controllable input
User is affected if running Citrix Metaframe version 1.8 and the application logs IP addresses supplied by the client rather than extracting them from network packet headers
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 dataUpdate the application to derive client IP addresses from packet headers (e.g., REMOTE_ADDR in HTTP) rather than trusting client-supplied values; implement validation if multiple sources are used.
Fix this in Metaframe
Scoped from the published advisory
- 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-2001-0908 — 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-2001-0908 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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