CVE-2024-1543
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 side-channel protected T-Table implementation in wolfSSL up to version 5.6.5 protects against a side-channel attacker with cache-line resolution. In a controlled environment such as Intel SGX, an attacker can gain a per instruction sub-cache-line resolution allowing them to break the cache-line-level protection. For details on the attack refer to: https://doi.org/10.46586/tches.v2024.i1.457-500
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 confidencewolfSSL's side-channel protected T-Table implementation (used in cryptographic operations) provides protection against cache-line resolution attacks, but this protection can be bypassed in controlled environments like Intel SGX where attackers achieve per-instruction sub-cache-line resolution, breaking the cache-line-level security guarantees.
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< 5.6.6CVSS 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
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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 wolfSSL installation and versionRun 'wolfssl version' or check the library file version metadata. On Linux: 'dpkg -l | grep wolfssl' or 'rpm -qa | grep wolfssl'. In code: call wolfSSL_version() API.Affected if Installed version is earlier than 5.6.6
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Confirm T-Table implementation is in useReview build configuration for ENABLE_TIGERTABLE or similar T-Table related build flags. Check if the compiled binary links against the T-Table optimized crypto routines.Affected if T-Table based crypto implementation is enabled and used for cryptographic operations
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Determine if running in Intel SGX environmentInspect the deployment environment. Check for SGX enclaves, review if the application runs inside an SGX-protected container, VM, or hardware enclave.Affected if The wolfSSL library operates within an Intel SGX enclave or controlled environment where attackers can achieve per-instruction sub-cache-line resolution
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Identify active cryptographic operationsReview application logs or code to determine which crypto functions are being called (e.g., AES encryption, hashing). T-Table usage primarily affects table-based cipher implementations.Affected if Table-based symmetric encryption or other operations utilizing the T-Table implementation are performed in an SGX context
User is affected if wolfSSL version is below 5.6.6, the T-Table implementation is enabled, and the application operates in an Intel SGX environment where cache-line granularity attacks can be escalated.
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 · scoped5.6.6
Upgrade to a wolfSSL version beyond 5.6.5 that addresses this sub-cache-line resolution vulnerability, or implement additional countermeasures as detailed in the referenced TCHES research paper.
wolfSSL 5.6.6
- Identify the current wolfSSL version in use by checking your project dependencies or system packages
- Upgrade wolfSSL to version 5.6.6 or later
- Rebuild and recompile any applications that link against wolfSSL
- Verify that the new version is correctly installed and in use
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-1543 — 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-2024-1543 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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