CVE-2023-45199
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 · uneditedMbed TLS 3.2.x through 3.4.x before 3.5 has a Buffer Overflow that can lead to remote Code execution.
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 confidenceMbed TLS versions 3.2.x through 3.4.x contain a buffer overflow vulnerability that can be exploited to achieve remote code execution. The vulnerability was addressed in version 3.5.
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>= 3.2.0, < 3.5.0CVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/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 Mbed TLS library versionCheck the version of the Mbed TLS library installed in your system. This can typically be found via: 1) pkg-config --modversion mbedtls or mbedcrypto, 2) checking library file metadata with `ls -la` or `file` on libmbedtls.so or libmbedcrypto.so files, 3) reviewing build artifacts or dependency manifests that list the Mbed TLS version, 4) checking version headers if you have access to source code (such as include/mbedtls/version.h)Affected if The installed version is 3.2.0, 3.2.1, 3.3.0, 3.3.1, 3.4.0, or any 3.4.x version prior to 3.5.0
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Check for Mbed TLS in application dependenciesExamine your application's dependency list, package lock files (package-lock.json, requirements.txt, Cargo.lock, etc.), or software bill of materials (SBOM) to determine if Mbed TLS or its variants (trustedfirmware-mbedtls, mbedtls, libmbedtls) are listed as a dependency and note the versionAffected if Mbed TLS is listed as a direct or transitive dependency with a version in the 3.2.x to 3.4.x range
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Locate Mbed TLS shared librariesSearch for Mbed TLS library files on the system using: `find / -name 'libmbed*' -type f 2>/dev/null` or check common library paths such as /usr/lib/, /usr/local/lib/, /opt/, or application-specific lib directories. Use `strings` or `readelf` on found libraries to extract version strings if not clearly namedAffected if Mbed TLS libraries are found and their version falls within the affected range (3.2.0 to less than 3.5.0)
You are affected if any Mbed TLS library in your environment is version 3.2.0 or later but earlier than 3.5.0.
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 · scoped3.5.0
Upgrade Mbed TLS to version 3.5 or later to remediate this vulnerability.
3.5.0 or later
- Verify current Mbed TLS version by checking library files or build configuration
- Download Mbed TLS 3.5.0 or later from the official repository (https://github.com/Mbed-TLS/mbedtls)
- Replace existing Mbed TLS installation files with the new version
- Rebuild any applications that link against the Mbed TLS library
- Verify the upgrade by confirming the new version number in the library
- Test that cryptographic operations function correctly with the updated library
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing8.0 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 $6,656.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-45199 — 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-2023-45199 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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