CVE-2020-27337
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 · uneditedAn issue was discovered in Treck IPv6 before 6.0.1.68. Improper Input Validation in the IPv6 component allows an unauthenticated remote attacker to cause an Out of Bounds Write, and possibly a Denial of Service via network access.
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 confidenceThis is an improper input validation vulnerability in the Treck IPv6 TCP/IP stack (versions before 6.0.1.68). An unauthenticated remote attacker can send specially crafted IPv6 network packets that trigger an out-of-bounds memory write, potentially leading to denial of service or possibly code execution.
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< 6.0.1.68CVSS 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
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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 Treck IPv6 stack is in useReview software bills of materials (BOMs), firmware manifests, or vendor documentation to determine if your system or device incorporates the Treck IPv6 TCP/IP stack. Check any third-party library dependencies or embedded component lists.Affected if Treck IPv6 is present in your environment's software or firmware
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Determine the installed Treck IPv6 versionLocate the Treck library version through vendor release notes, firmware metadata, library file properties, or by contacting the vendor or system integrator who provided the product. Compare the discovered version against the fixed release 6.0.1.68.Affected if The installed version is earlier than 6.0.1.68
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Verify IPv6 network functionality is enabledCheck system or device network configuration settings for active IPv6 interfaces. Review network stack configuration files or management interfaces to confirm IPv6 protocol support is turned on.Affected if IPv6 is enabled and the system can receive IPv6 network traffic
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Assess IPv6 network exposureEvaluate whether the affected system accepts IPv6 traffic from untrusted or external network sources. Check firewall rules, network segmentation, and access control lists governing IPv6 traffic.Affected if The system has direct IPv6 access from untrusted network segments or the internet
You are affected if your environment uses any version of the Treck IPv6 stack earlier than 6.0.1.68, has IPv6 enabled, and can receive IPv6 packets from potentially untrusted sources.
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 data6.0.1.68
Update Treck IPv6 to version 6.0.1.68 or later to incorporate the input validation fix. If patching is not immediately possible, restrict network access to IPv6 traffic from untrusted sources.
- Consultation4.0 h
- Implementation8.0 h
- Testing12.0 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 $7,616.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-27337 — 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-2020-27337 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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