CVE-2020-13593
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 Bluetooth Low Energy Secure Manager Protocol (SMP) implementation in Texas Instruments SimpleLink SIMPLELINK-CC2640R2-SDK through 2.2.3 allows the Diffie-Hellman check during the Secure Connection pairing to be skipped if the Link Layer encryption setup is performed earlier. An attacker in radio range can achieve arbitrary read/write access to protected GATT service data, cause a denial of service, or possibly control a device's function by establishing an encrypted session with an unauthenticated Long Term Key (LTK).
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 BLE SMP implementation in TI SimpleLink-CC2640R2-SDK through 2.2.3 has a race condition where the Diffie-Hellman check during Secure Connection pairing can be bypassed if Link Layer encryption is set up earlier. This allows an attacker in radio range to establish an encrypted session using an unauthenticated Long Term Key (LTK), granting unauthorized read/write access to protected GATT services, causing DoS, or potentially controlling device functions.
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<= 2.2.3CVSS 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
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/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 the TI SimpleLink CC2640R2 SDK version in useLocate the SDK version in project files, build configuration, or firmware documentation - check release notes, version headers, or the SDK installation directory nameAffected if The SDK version is 2.2.3 or any version prior to 2.2.3 (versions <= 2.2.3 are affected)
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Confirm BLE functionality is enabled on the deviceReview the firmware or application code to verify the BLE stack (GAP/SMP) is initialized and active - look for BLE stack initialization calls in the main applicationAffected if BLE is enabled and the device accepts BLE connections
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Determine if Secure Connections pairing mode is configuredCheck the BLE security configuration in the application - look for Secure Connections or LE Secure Connections mode settings in SMP/GAP security parametersAffected if The device is configured to use BLE Secure Connections pairing for authentication
The device is affected if it uses firmware built with TI SimpleLink CC2640R2 SDK version 2.2.3 or earlier and has BLE Secure Connections pairing enabled, as the race condition in the SMP implementation can be triggered during the pairing process.
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 the vendor patch (SDK version 2.2.4 or later) when released. Until then, minimize BLE exposure, restrict critical GATT services, and monitor for unauthorized BLE connections.
- 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-2020-13593 — 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-2020-13593 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
- No weaponised exploit code, or anything meant to cause harm
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