CVE-2024-33659

BiosGuard Buffer Overflow and TOCTOU Vulnerability

Published Feb 11, 2025 CVSS 4.0 · 5.7 Medium EPSS < 1% KEV · Not listed

Description

AMI APTIOV contains a vulnerability in BIOS where an attacker may cause an Improper Input Validation by a local attacker. Successful exploitation of these vulnerabilities may lead to overwriting arbitrary memory and execute arbitrary code at SMM level, also impacting Confidentiality, Integrity, and Availability.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

AMI

AptioV

unaffected

Version	Status	Constraints
`BKS_5.0`	affected	≤ BKS_5.38

Configuration 1 [-]

cpe:2.3:o:ami:aptio_v:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2024-31375	AMI APTIOV contains a vulnerability in BIOS where an attacker may cause an Improper Input Validation by a local attacker. Successful exploitation of these vulnerabilities may lead to overwriting arbitrary memory and execute arbitrary code at SMM level, also impacting Confidentiality, Integrity, and Availability.

Metrics

Attack Vector Local

Attack Complexity High

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact Low

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.160% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/2025/AMI-SA-2025002.pdf

History

Oct 2, 2025 2:45 PM First appearance in the feed. Affected versions updated. Affected vendors updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
First Time appeared		Ami Ami aptio V
CPEs		cpe:2.3:o:ami:aptio_v::::::::
Vendors & Products		Ami Ami aptio V
Metrics		cvssV3_1 `{'score': 8.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}`

Jul 11, 2025 1:45 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00029}`	epss `{'score': 0.00032}`

Feb 11, 2025 4:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Feb 11, 2025 3:15 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		AMI APTIOV contains a vulnerability in BIOS where an attacker may cause an Improper Input Validation by a local attacker. Successful exploitation of these vulnerabilities may lead to overwriting arbitrary memory and execute arbitrary code at SMM level, also impacting Confidentiality, Integrity, and Availability.
Title		BiosGuard Buffer Overflow and TOCTOU Vulnerability
Weaknesses		CWE-20
References		https://9443417.fs1.hubspotusercontent-na1.net/hubfs/9443417/Security%20Advisories/2025/AMI-SA-2025002.pdf
Metrics		cvssV4_0 `{'score': 5.7, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L'}`