CVE-2024-55412

High

Published: 07 January 2025

Published

07 January 2025

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0002 3.9th percentile

Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-55412 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Sunix (inferred from references). Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 3.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SC-41 (Port and I/O Device Access) and SI-10 (Information Input Validation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploitation for Privilege Escalation (T1068) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SC-41 Port and I/O Device Access good match

prevent

Directly restricts low-privileged access to I/O ports and devices, preventing exploitation of arbitrary read/write via crafted IOCTLs in snxpsamd.sys.

SI-10 Information Input Validation good match

prevent

Requires validation of IOCTL inputs to the vulnerable driver, blocking specially crafted requests that enable privilege escalation and information disclosure.

SI-2 Flaw Remediation good match

prevent

Mandates timely identification, reporting, and correction of flaws like the IOCTL vulnerability in the SUNIX snxpsamd.sys driver.

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation

Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.

attack.mitre.org →

T1553.002 Code Signing Defense Impairment

Adversaries may create, acquire, or steal code signing materials to sign their malware or tools.

attack.mitre.org →

Why these techniques?

Vulnerable signed driver enables local privilege escalation via arbitrary I/O port access (T1068) and bypasses driver code signing enforcement to load malicious kernel code (T1553.002).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

A vulnerability exits in driver snxpsamd.sys in SUNIX Serial 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.

Deeper analysisAI

CVE-2024-55412 is a vulnerability in the snxpsamd.sys driver within SUNIX Serial Driver x64 version 10.1.0.0. It enables low-privileged users to read and write arbitrary I/O ports through specially crafted IOCTL requests. The issue, published on 2025-01-07, carries a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) and is associated with CWE-787.

Low-privileged local attackers can exploit this vulnerability to achieve privilege escalation, execute code under high privileges, and perform information disclosure. As a signed driver, it can also bypass Microsoft's driver-signing policy, facilitating the deployment of malicious code.

Details on the vulnerability, including potential exploitation techniques, are available in the GitHub repository at https://github.com/heyheysky/vulnerable-driver/blob/master/CVE-2024-55412/CVE-2024-55412_snxpsamd.sys_README.md. The vendor website is at https://www.sunix.com/tw/.