CVE-2001-0175
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 caching module in Netscape Fasttrack Server 4.1 allows remote attackers to cause a denial of service (resource exhaustion) by requesting a large number of non-existent URLs.
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 confidenceThe caching module in Netscape Fasttrack Server 4.1 does not properly handle requests for non-existent URLs. An attacker can exploit this by issuing a large volume of requests for non-existent URLs, causing the server's cache to fill up and exhaust resources, resulting in denial of service.
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= 4.0.1CVSS 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
- Partial
AV:N/AC:L/Au:N/C:N/I:N/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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Identify if Netscape Fasttrack Server is installedCheck for Netscape Fasttrack Server processes running on the system or look for installation directories (typically under /opt/netscape or C:\Program Files\Netscape\Server). On Unix systems, check for processes named 'httpd' or 'netscape-fasttrack'. On Windows, look for the Netscape Server service.Affected if Netscape Fasttrack Server is installed and running as a service or daemon.
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Verify the installed version matches the affected versionCheck the server version using the administrative interface, running 'httpd -v' from the server bin directory, or examining version files in the installation directory (such as 'about.htm' or 'version.txt' in the server root).Affected if The installed version is Netscape Fasttrack Server 4.0.1.
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Confirm the caching module is enabledExamine the server configuration file (typically 'obj.conf' or 'magnus.conf') for caching-related directives. Look for CacheEnable, CacheSize, or similar caching module configurations that control the caching behavior.Affected if The caching module is enabled and configured to cache responses.
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Determine if the server is network-accessibleCheck network listening configuration. Verify if the server is bound to a network interface (0.0.0.0) rather than localhost only, and check firewall rules that might allow external access to the HTTP port (default 80).Affected if The server is accessible over the network to untrusted users who could send malicious requests.
You are affected if Netscape Fasttrack Server 4.0.1 is installed with the caching module enabled and the server is network-accessible, allowing attackers to flood it with requests for non-existent URLs.
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 dataNetscape Fasttrack Server 4.1 is extremely outdated (2001) and likely no longer supported. The primary remediation is to migrate to a modern, supported web server. As an interim control, implement rate limiting or web application firewall rules to block excessive requests for non-existent URLs.
- 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-2001-0175 — 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-2001-0175 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