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Out-of-bounds WriteWeakness · CWE-787

CVE-2024-55413

HIGH · 7.8 CVSS v3.1 Published 2025-01-07
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
80/100
Remediation priority · High
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 vulnerability exits in driver snxppamd.sys in SUNIX Parallel Driver x64 - 10.1.0.0, which allows low-privileged users to read and write arbitary i/o port via specially crafted IOCTL requests . This can be exploited for privilege escalation, code execution under high privileges, and information disclosure. These signed drivers can also be used to bypass the Microsoft driver-signing policy to deploy malicious code.

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 confidence

A kernel-mode driver vulnerability in SUNIX Parallel Driver (snxppamd.sys) version 10.1.0.0 allows low-privileged users to read/write arbitrary I/O ports via specially crafted IOCTL requests. This enables local privilege escalation to SYSTEM level and code execution with kernel privileges. The driver's valid signature can be leveraged to bypass Microsoft driver-signing requirements for malicious purposes.

MitigationRemove or disable the vulnerable snxppamd.sys driver if not required for operations; otherwise, apply vendor-provided patches when available. Restrict user access to the driver and monitor for suspicious IOCTL calls.

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

CVSS:3.1/AV:L/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 checks

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

  1. Locate the snxppamd.sys driver file
    Search for snxppamd.sys on the system using File Explorer search or command: dir /s C:\snxppamd.sys (adjust drive letter as needed)
    Affected if The driver file exists on the system - further version checking is required
  2. Verify the driver file version
    Right-click the snxppamd.sys file, select Properties, then view the Details tab to find the Product Version. Alternatively, use PowerShell: (Get-Item "C:\path\to\snxppamd.sys").VersionInfo | Select-Object ProductVersion
    Affected if Product Version shows 10.1.0.0 exactly - this is the vulnerable version
  3. Check if the driver is currently loaded
    Open an elevated command prompt and run: sc query snxppamd or check Device Manager for SUNIX Parallel Driver. Also check running services: Get-Service | Where-Object {$_.Name -like "*sunix*"}
    Affected if The driver service exists and shows state as RUNNING - the driver is active and the vulnerability is exploitable if the driver accepts IOCTL requests
  4. Review driver signing status
    Right-click the driver file, select Properties, then view the Digital Signatures tab. Or use: signtool verify /pa /v C:\path\to\snxppamd.sys
    Affected if The driver has a valid signature - combined with the vulnerable version, this creates the bypass condition described in the CVE where the signed driver can be leveraged for malicious purposes
  5. Check for suspicious IOCTL communication
    Use tools like Process Monitor (filter by snxppamd.sys) or Microsoft Sysinternals Azure ATP to monitor for unusual IOCTL calls to the driver from low-privilege processes
    Affected if IOCTL requests are being sent to the driver from user-level processes, especially those initiated by non-admin accounts - this indicates active exploitation attempts

The system is affected if snxppamd.sys version 10.1.0.0 is present and the driver is loaded or loadable, enabling low-privileged users to perform arbitrary I/O port operations.

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.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Remove or disable the vulnerable snxppamd.sys driver if not required for operations; otherwise, apply vendor-provided patches when available. Restrict user access to the driver and monitor for suspicious IOCTL calls.

Have this fixed Scoped from the published advisory
  • Consultation3.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA2.0 h
9.0 hours of engineering $1,620
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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-2024-55413 in production — separate from our analysis above.

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What this is

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