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Ideacentre C5 14imb05 FirmwareOperating system · Lenovo

CVE-2023-45079

MEDIUM · 6.7 CVSS v3.1 Published 2023-11-08
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
69/100
Remediation priority · Elevated
Zero-click

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 · unedited
A memory leakage vulnerability was reported in the NvmramSmm SMM driver that may allow a local attacker with elevated privileges to write to NVRAM variables.

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 confidence

Memory leakage vulnerability in the NvmramSmm SMM (System Management Mode) driver allows a local attacker with elevated privileges to write to NVRAM variables. The leak occurs due to improper memory management in the SMM driver, potentially allowing memory exhaustion or controlled memory overwrite for privilege escalation.

MitigationApply vendor-provided firmware updates that patch the NvmramSmm driver memory management. Since this is an SMM driver vulnerability, standard OS-level patches will not address it; firmware/BIOS update from the system OEM is required.

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
Ideacentre C5 14imb05 FirmwareOperating system
Affected:< o4hkt3ca
Ideacentre 3 07ada05 FirmwareOperating system
Affected:< o4fkt39a
Ideacentre 3 07imb05 FirmwareOperating system
Affected:< m2vkt21a
Ideacentre G5 14imb05 FirmwareOperating system
Affected:< o4hkt3ca
Ideacentre 5 14iob6 FirmwareOperating system
Affected:< m3gkt3da
Ideacentre Creator 5 14iob6 FirmwareOperating system
Affected:< m3gkt3da
Ideacentre G5 14amr05 FirmwareOperating system
Affected:< o4zkt2ba
Ideacentre Gaming 5 14iob6 FirmwareOperating system
Affected:< m3gkt3da

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
Local
Complexity
Low
Privileges
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:H/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify the Ideacentre model
    Run 'wmic csproduct get name' or check system documentation to confirm the exact model number (e.g., Ideacentre C5 14imb05, Ideacentre 3 07ada05, etc.)
    Affected if Model is not one of the eight listed affected Ideacentre models
  2. Check current firmware version
    Access the system BIOS/UEFI setup (press F1 or Del at boot) and note the BIOS/firmware version, or use 'wmic bios get smbiosbiosversion' from an elevated command prompt
    Affected if Firmware version cannot be retrieved or is not visible
  3. Compare firmware version against thresholds
    Compare your installed firmware version to the affected version ranges: Ideacentre C5 14imb05 requires o4hkt3ca or higher, Ideacentre 3 07ada05 requires o4fkt39a or higher, Ideacentre 3 07imb05 requires m2vkt21a or higher, Ideacentre G5 14imb05 requires o4hkt3ca or higher, Ideacentre 5 14iob6 requires m3gkt3da or higher, Creator 5 14iob6 requires m3gkt3da or higher, Ideacentre G5 14amr05 requires o4zkt2ba or higher, Ideacentre Gaming 5 14iob6 requires m3gkt3da or higher
    Affected if Installed firmware version is older (lexicographically lower) than the required version for your specific model

You are affected if you own one of the eight listed Ideacentre models and your current firmware version is below the specified threshold for that model.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply vendor-provided firmware updates that patch the NvmramSmm driver memory management. Since this is an SMM driver vulnerability, standard OS-level patches will not address it; firmware/BIOS update from the system OEM is required.

Recommended fix High confidence

Update to firmware version o4hkt3ca (C5 14imb05, G5 14imb05), o4fkt39a (07ada05), m2vkt21a (07imb05), m3gkt3da (5 14iob6, Creator 5 14iob6, Gaming 5 14iob6), or o4zkt2ba (G5 14amr05) as appropriate for your model

  1. 1. Identify the exact model number of the affected Lenovo Ideacentre system by checking the system label or BIOS information.
  2. 2. Determine the current firmware version installed on the system - this can typically be found in the BIOS setup (F1 on boot) under 'System Information' or via the Lenovo Vantage/Legacy Update utility.
  3. 3. Navigate to the official Lenovo support website (support.lenovo.com) and enter the specific model number (e.g., 14imb05, 07ada05, 07imb05, 14iob6, 14amr05) to locate firmware downloads.
  4. 4. Download the BIOS/firmware update package corresponding to the fixed version for your model: o4hkt3ca, o4fkt39a, m2vkt21a, m3gkt3da, or o4zkt2ba as applicable.
  5. 5. Follow Lenovo's firmware update instructions - this usually involves running the update executable while the system is plugged into AC power and not interrupting the update process.
  6. 6. After the firmware update completes, verify the new firmware version matches or exceeds the fixed version listed.
  7. 7. Reboot the system to ensure the updated SMM driver loads with the security fix.
Caveat Firmware updates carry inherent risk; ensure stable power during update and do not interrupt the process - a failed update may require service repair

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Ideacentre C5 14imb05 Firmware Scoped from the published advisory
  • Consultation10.0 h
  • Implementation16.0 h
  • Testing12.0 h
  • Review / QA8.0 h
46.0 hours of engineering $8,120
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-45079 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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