CVE-2023-34344
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 · uneditedAMI BMC contains a vulnerability in the IPMI handler, where an unauthorized attacker can use certain oracles to guess a valid username, which may lead to information disclosure.
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 confidenceAMI Baseboard Management Controller (BMC) firmware contains an information disclosure vulnerability in the IPMI handler. Attackers can exploit certain response 'oracles' (such as timing differences or error message variations) to perform username enumeration, allowing them to guess valid usernames for the IPMI interface. This weakens authentication security by reducing the search space for brute-force or credential recovery attacks.
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>= 12.0, < 12.7>= 13.0, < 13.5CVSS 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
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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.
-
Identify BMC firmware product and versionAccess the BMC web interface or use IPMI command: `ipmitool -I lanplus -H <bmc-ip> -U <user> -P <pass> raw` with 'mc info' or 'bmc-info' to retrieve firmware version and product name. Alternatively, check via vendor web UI under Firmware/Inventory section.Affected if The product is 'Ami Megarac Sp X' AND version is 12.0 <= x < 12.7 OR 13.0 <= x < 13.5
-
Verify IPMI interface is enabledCheck BMC network settings via web UI or run `ipmitool -I lanplus -H <bmc-ip> -U <user> -P <pass> channel info 1` to confirm IPMI over LAN is active. Also verify port 623/UDP is listening on the BMC.Affected if IPMI interface is enabled and accessible over the network (port 623/UDP is open)
-
Confirm IPMI network exposureScan the BMC IP from an untrusted network segment: `nmap -sU -p 623 <bmc-ip>` or review firewall/segmentation rules to determine if the BMC IPMI service is reachable from non-management networks.Affected if The BMC IPMI service is reachable from untrusted or external network segments
You are affected if your BMC runs Ami Megarac Sp X firmware versions 12.0-12.6 or 13.0-13.4 AND the IPMI interface is network-accessible.
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 · scoped12.713.5
Apply the vendor-supplied firmware patch from AMI to address the IPMI oracle vulnerability. Additionally, restrict IPMI/BMC network access to trusted management networks and disable any default or anonymous IPMI accounts to reduce attack surface.
Megarac Sp X version 12.7 or later (for 12.x line); Megarac Sp X version 13.5 or later (for 13.x line)
- Identify the currently installed Megarac Sp X version using the BMC web interface or CLI
- If version is >= 12.0 and < 12.7, upgrade to version 12.7 or later
- If version is >= 13.0 and < 13.5, upgrade to version 13.5 or later
- After upgrade, verify the IPMI handler no longer reveals valid username information through timing differences or other oracles
- Verify that existing user accounts remain intact after the upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,888.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-34344 — 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-2023-34344 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