Nac ManagerApplication · Cisco
CVE-2011-3305
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 · uneditedDirectory traversal vulnerability in Cisco Network Admission Control (NAC) Manager 4.8.x allows remote attackers to read arbitrary files via crafted traffic to TCP port 443, aka Bug ID CSCtq10755.
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 confidenceDirectory traversal vulnerability in Cisco NAC Manager 4.8.x allows remote unauthenticated attackers to read arbitrary files on the system by using '../' sequences in requests to the HTTPS service on TCP port 443. This enables exposure of sensitive system files, configuration data, and credentials.
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
Nac ManagerApplication
= 4.8= 4.8\(1\)= 4.8\(2\)CVSS 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
- Complete
- Integrity
- None
- Availability
- None
AV:N/AC:L/Au:N/C:C/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 Cisco NAC Manager installationLocate the Cisco NAC Manager application on the system or network device. Confirm the product name matches 'Cisco NAC Manager' in installed software, device management interface, or system documentation.Affected if The product is not Cisco NAC Manager (different product or not installed).
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Check installed version numberAccess the Cisco NAC Manager admin interface, command line interface, or check system files/registry for the exact version number. Look for version strings containing '4.8', '4.8(1)', or '4.8(2)'.Affected if The installed version is 4.8, 4.8(1), or 4.8(2).
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Verify HTTPS service is enabled on port 443Check if the Cisco NAC Manager web interface is accessible via HTTPS on TCP port 443. Use a network scan (e.g., 'nmap -p 443 <target>') or check service configuration to confirm HTTPS listener is active.Affected if HTTPS service on port 443 is exposed and accessible.
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Confirm directory traversal is possibleSend a test HTTPS request containing '../' sequences to the service on port 443 (e.g., GET /..%2f..%2f..%2fetc%2fpasswd HTTP/1.1). Observe if the response contains content from files outside the web root directory.Affected if The application returns file contents from outside the intended web directory in response to path traversal sequences.
A system is affected if Cisco NAC Manager version 4.8, 4.8(1), or 4.8(2) is installed with HTTPS service on port 443 exposed and vulnerable to path traversal attacks.
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 dataApply vendor patch for Bug ID CSCtq10755. If no patch available, implement input validation to reject path traversal sequences ('../') in HTTP requests and restrict file access to intended directories.
Fix this in Nac Manager
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2011-3305 — 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-2011-3305 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
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