CVE-2024-7383
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 · uneditedA flaw was found in libnbd. The client did not always correctly verify the NBD server's certificate when using TLS to connect to an NBD server. This issue allows a man-in-the-middle attack on NBD traffic.
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 · high confidencelibnbd contains a TLS certificate verification flaw where the client does not always correctly validate the NBD server's certificate during TLS handshake. This allows an attacker positioned between the client and server to intercept traffic by presenting a fraudulent certificate, enabling a man-in-the-middle attack on NBD connections.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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.
-
Verify libnbd is installedRun 'rpm -qa | grep libnbd' on RHEL-based systems, or 'dpkg -l | grep libnbd' on Debian-based systems, or check your system's package manager for the libnbd packageAffected if libnbd is not installed means not affected; if installed, continue to version check
-
Determine installed libnbd versionRun 'rpm -q libnbd --queryformat "%{VERSION}-%{RELEASE}"' on RHEL, or 'dpkg -s libnbd' on Debian, or use 'nbdinfo --version' if the tool is availableAffected if Version is present - compare to the fixed version for your distribution to determine if vulnerable
-
Check if TLS is enabled for NBD connectionsReview NBD client configurations, scripts, or application code that uses libnbd; look for TLS-related options such as '--tls' or 'NBD_OPT_TLS' in the connection setupAffected if TLS is not used with NBD connections means not affected; if TLS is used, the vulnerability applies
-
Inspect TLS certificate verification configurationCheck libnbd client configuration files, environment variables (such as LIBNBD_* variables), or application code for certificate verification settings; verify if the server certificate is being validatedAffected if Certificate verification is disabled, missing, or not enforced indicates the vulnerability is exploitable
A system is affected if libnbd is installed, TLS is enabled for NBD connections, and the installed version predates the fixed release that implements proper TLS certificate chain validation.
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 dataEnsure libnbd is updated to a version that implements proper TLS certificate chain validation. If immediate patching is not possible, avoid using TLS with untrusted networks or verify server certificates manually before establishing NBD sessions.
- Consultation4.0 h
- Implementation12.0 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 $7,808.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-7383 — 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-2024-7383 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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
- No spam, self-promotion, credentials, or personal data