CVE-2023-34329
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 MegaRAC SPx12 contains a vulnerability in BMC where a User may cause an authentication bypass by spoofing the HTTP header. A successful exploit of this vulnerability may lead to loss of confidentiality, integrity, and availability.
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 MegaRAC SPx12 BMC firmware contains an authentication bypass vulnerability where the web interface improperly trusts certain HTTP header values (likely X-Forwarded-For, Host, or similar headers) used for client identification. An attacker can spoof these headers to bypass authentication checks and gain unauthorized access to the BMC management interface.
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= 13CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:L/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 BMC firmware versionAccess the BMC web interface or use IPMI command 'ipmitool mc info' or 'ipmitool -I lanplus -H <BMC-IP> -U <user> -P <pass> mc info' to retrieve firmware version detailsAffected if Firmware version matches 12.x or 13.x of AMI MegaRAC SPx
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Confirm web management interface is enabledAttempt to access BMC web UI via HTTPS/HTTP (typically ports 443 or 80) or check via IPMI: 'ipmitool -I lanplus -H <BMC-IP> -U <user> -P <pass> raw' command to query web service statusAffected if Web interface responds and accepts HTTP requests
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Verify BMC is network accessiblePing the BMC IP address and verify ports 443/HTTPS and 80/HTTP are open using 'nmap -p 80,443 <BMC-IP>' or 'Test-NetConnection -ComputerName <BMC-IP> -Port 443'Affected if BMC is reachable on network and web ports are open
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Review HTTP header handling configurationInspect BMC web server configuration files if accessible via Redfish API endpoint '/redfish/v1/Managers/Self' or examine HTTP response headers from BMC for server type informationAffected if BMC web server accepts and processes X-Forwarded-For or Host headers without validation
Environment is affected if BMC runs AMI MegaRAC SPx firmware versions 12.x or 13.x and the web management interface is network-accessible, allowing potential HTTP header spoofing for authentication bypass.
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 latest AMI MegaRAC SPx12 firmware security patch from the vendor. Additionally, restrict BMC network access to trusted management networks using firewall rules or VLAN segmentation to reduce attack surface.
- Consultation6.0 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-2023-34329 — 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-2023-34329 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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