CVE-2019-11219
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 algorithm used to generate device IDs (UIDs) for devices that utilize Shenzhen Yunni Technology iLnkP2P suffers from a predictability flaw that allows remote attackers to establish direct connections to arbitrary devices.
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 iLnkP2P protocol used by Shenzhen Yunni Technology devices implements a predictable algorithm for generating device UIDs. Attackers can enumerate valid UIDs and establish direct P2P connections to targeted devices without authentication, enabling unauthorized remote access.
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 dataall versionsCVSS 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
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/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 iLnkP2P protocol usageReview network documentation, device inventories, or scan for devices advertising P2P services. Look for products from Shenzhen Yunni Technology or any device referencing 'iLnkP2P' in its network configuration or firmware.Affected if Any device in the environment implements the iLnkP2P protocol for remote access.
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Inspect device UID formatAccess the device management interface or API and retrieve the device UID. Examine whether the UID follows a sequential, timestamp-based, or otherwise predictable pattern rather than appearing cryptographically random.Affected if The device UID can be predicted or enumerated based on observing other UIDs.
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Verify P2P port exposureScan network perimeter for open ports commonly used by iLnkP2P (typically UDP ports in the 5000-6000 range, or as documented for the specific device). Check router/firewall rules for port forwarding or UPnP configurations exposing P2P ports externally.Affected if P2P ports are accessible from untrusted networks or the internet.
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Confirm P2P authentication requirementsAttempt to initiate a P2P connection to a target device UID from an unauthorized client. Observe whether the connection establishes without any credential challenge or authentication step.Affected if P2P connections complete without requiring authentication or valid credentials.
An environment is affected if it contains devices using the iLnkP2P protocol with predictable UIDs and accessible P2P connections that do not require authentication.
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 dataReplace the UID generation algorithm with cryptographically secure random number generation and implement proper authentication for P2P connections; coordinate with device manufacturers for firmware updates.
- Consultation8.0 h
- Implementation24.0 h
- Testing16.0 h
- Review / QA8.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-11219 — 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-2019-11219 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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- Version or environment caveats, and links to real fixes
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