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InsydecrpkgApplication · Insyde

CVE-2023-25600

HIGH · 7.1 CVSS v3.1 Published 2023-08-03
Fix available
A fix is available. Upgrade to 01.01.04.0016 or later.
See remediation →
73/100
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
An issue was discovered in InsydeH2O. A malicious operating system can tamper with a runtime-writable EFI variable, leading to out-of-bounds memory reads and a denial of service. This is fixed in version 01.01.04.0016.

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

InsydeH2O UEFI firmware contains a vulnerability where a malicious operating system can tamper with runtime-writable EFI variables, causing out-of-bounds memory reads and denial of service. This affects firmware versions prior to 01.01.04.0016.

MitigationUpdate InsydeH2O firmware to version 01.01.04.0016 or later across all affected systems. Prioritize systems where the OS could be compromised or where untrusted code may run.

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
InsydecrpkgApplication
Affected:< 01.01.04.0016

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 UEFI firmware vendor
    Use system information tools (dmidecode on Linux, wmic on Windows, or UEFI shell) to check if the system uses InsydeH2O UEFI firmware by examining the BIOS vendor or firmware version string.
    Affected if The system does not use InsydeH2O firmware (not vulnerable to this specific CVE).
  2. Retrieve the installed InsydeH2O firmware version
    From Linux, run 'dmidecode -s bios-version' or check /sys/class/dmi/id/bios_version. From Windows, run 'wmic bios get SMBIOSBIOSVersion' or check System Information. From UEFI shell, use 'version' or 'dmpstore' commands if available.
    Affected if Unable to determine the firmware version (cannot confirm vulnerability status).
  3. Compare against the vulnerable version range
    Check if the installed version string is present and compare it numerically to 01.01.04.0016. Any version less than 01.01.04.0016 is affected.
    Affected if The installed version is a version number less than 01.01.04.0016 (for example, 01.01.03.0001 or 01.01.02.xxxx).
  4. Determine if runtime-writable EFI variables are accessible
    This vulnerability requires a malicious OS to write to EFI variables. On a compromised or untrusted OS, an attacker with privileged access could attempt to modify EFI variables through efivarfs (Linux) or SetVariable (UEFI runtime services).
    Affected if The system runs untrusted or compromised operating systems where code execution with elevated privileges is possible.

The system is affected if it uses InsydeH2O UEFI firmware with a version number lower than 01.01.04.0016 and runs an operating system where a malicious actor could tamper with runtime-writable EFI variables.

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
Upgrade available Upgrade to 01.01.04.0016 or later
Fixed in 01.01.04.0016
Interim mitigation

Update InsydeH2O firmware to version 01.01.04.0016 or later across all affected systems. Prioritize systems where the OS could be compromised or where untrusted code may run.

Recommended fix High confidence

01.01.04.0016

  1. 1. Identify the current InsydeH2O/Insydecrpkg firmware version installed on the affected system via UEFI BIOS settings or system information utilities
  2. 2. Obtain the fixed firmware version 01.01.04.0016 from Insyde's official support website or the hardware/system vendor
  3. 3. Download the firmware update package following the vendor's specific instructions
  4. 4. Apply the firmware update using the vendor-recommended method (typically a BIOS update utility, USB-based firmware update, or UEFI firmware update interface)
  5. 5. Restart the system to complete the firmware update process
  6. 6. Verify the firmware has been updated to version 01.01.04.0016 by checking the BIOS/UEFI information

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

Fix this in Insydecrpkg Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing8.0 h
  • Review / QA4.0 h
36.0 hours of engineering $6,400
Get the upgrade done

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Scan for this in your stack

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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-2023-25600 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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