CVE-2020-11896
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 Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.
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 confidenceA remote code execution vulnerability in the Treck TCP/IP stack versions prior to 6.0.1.66, specifically in the IPv4 tunneling functionality. This low-level network stack component is widely used in embedded systems, IoT devices, and some operating systems, allowing attackers to execute arbitrary code by sending specially crafted IPv4 packets.
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< 6.0.1.66CVSS 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
- Privileges
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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 Treck TCP/IP stack presenceLocate Treck library files (commonly named libtreck, treck.lib, or similar) in system firmware images, embedded device filesystems, or IoT device software packages. Search product documentation or SBOM (Software Bill of Materials) for 'Treck' as a dependency.Affected if Treck TCP/IP stack is present in the environment
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Determine installed Treck versionExtract version information from Treck library files, firmware metadata, or contact the device/vendor for the TCP/IP stack version. Check any version strings embedded in the binary or associated documentation.Affected if The discovered version is prior to 6.0.1.66 or version cannot be determined
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Verify IPv4 tunneling is enabledExamine device network configuration, kernel modules, or stack compile-time options to determine if IPv4 tunneling functionality (IP tunnel, GRE tunnel, or similar tunnel protocols) is enabled or actively used in the system.Affected if IPv4 tunneling is enabled and the Treck version is prior to 6.0.1.66
The system is affected if it runs any version of the Treck TCP/IP stack prior to 6.0.1.66 with IPv4 tunneling functionality enabled.
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.
dbcve · scoped6.0.1.66
Upgrade Treck TCP/IP stack to version 6.0.1.66 or later. If patching is not immediately feasible, implement network segmentation and restrict external access to affected systems to reduce attack surface.
6.0.1.66 or later
- Identify the specific product/vendor that embeds the Treck TCP/IP stack in your environment
- Consult your vendor's security advisory or release notes to obtain the specific patched version for your product
- Verify your current Treck TCP/IP stack version is below 6.0.1.66
- Obtain the vendor-provided patched version (6.0.1.66 or later) from your vendor's support portal
- Test the patched version in a non-production environment to verify compatibility
- Deploy the patched version to production systems
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,776.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-11896 — 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-2020-11896 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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