CVE-2000-0807
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 OPSEC communications authentication mechanism (fwn1) in Check Point VPN-1/FireWall-1 4.1 and earlier allows remote attackers to spoof connections, aka the "OPSEC Authentication Vulnerability."
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 OPSEC (Open Platform for Security) communications authentication mechanism (fwn1) in Check Point VPN-1/FireWall-1 version 4.1 and earlier contains a flaw that allows remote attackers to spoof connections by bypassing the authentication validation.
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= 3.0= 4.0= 4.1CVSS 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
- 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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Verify Check Point Firewall-1 installationCheck for the presence of Check Point Firewall-1 or VPN-1 processes (e.g., fw1, fwd, vpn) running on the system, or look for Check Point installation directories such as $FWDIR (typically /opt/CPfw1 or C:\Program Files\Checkpoint\FW1)Affected if Check Point Firewall-1 or VPN-1 software is not installed on the system
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Determine the installed Firewall-1 versionRun 'fw ver' or 'fw1admin -v' from the Check Point bin directory, or check the $FWDIR/core/VERSION file. Compare the version number to the affected range (3.0, 4.0, 4.1)Affected if The installed version is 3.0, 4.0, or 4.1
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Identify if OPSEC fwn1 authentication is enabledExamine the Check Point objects.C and fwauth.NDB files in $FWDIR/boot or review the OPSEC configuration in SmartDashboard for any fwn1 (FireWall-1 to FireWall-1) authentication entriesAffected if OPSEC fwn1 authentication is configured between Security Management Server and enforcement modules
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Check external authentication configurationReview the $FWDIR/conf/objects.C file and authentication settings in SmartDashboard to see if external/authentication servers are permitted for VPN-1/FireWall-1 connectionsAffected if External or OPSEC-based authentication is allowed in the Firewall-1 configuration
The environment is affected if Check Point Firewall-1 or VPN-1 versions 3.0, 4.0, or 4.1 are installed with OPSEC fwn1 authentication enabled, allowing remote attackers to bypass authentication validation.
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 version newer than VPN-1/FireWall-1 4.1, as later versions address this authentication bypass vulnerability.
- Consultation2.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,664.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2000-0807 — 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-2000-0807 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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