Phoenix WinFlash Driver prior 4.5.0.0 on Windows IOCTL permission assignment

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Phoenix WinFlash Driver on Windows. Affected by this issue is some unknown functionality of the component IOCTL Handler. The manipulation leads to permission assignment. This vulnerability is documented as CVE-2023-35841. The attack needs to be performed locally. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Phoenix WinFlash Driver on Windows. It has been rated as critical. This issue affects some unknown processing of the component IOCTL Handler. The manipulation with an unknown input leads to a permission assignment vulnerability. Using CWE to declare the problem leads to CWE-732. The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Exposed IOCTL with Insufficient Access Control in Phoenix WinFlash Driver on Windows allows Privilege Escalation which allows for modification of system firmware.This issue affects WinFlash Driver: before 4.5.0.0.

The weakness was released by Takahiro Haruyama. The advisory is shared at phoenix.com. The identification of this vulnerability is CVE-2023-35841 since 06/19/2023. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

Upgrading to version 4.5.0.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-39834). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Permission assignment
CWE: CWE-732 / CWE-275 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: WinFlash Driver 4.5.0.0

Timelineinfo

06/19/2023 🔍
05/14/2024 +330 days 🔍
05/14/2024 +0 days 🔍
07/29/2025 +440 days 🔍

Sourcesinfo

Advisory: phoenix.com
Researcher: Takahiro Haruyama
Status: Confirmed

CVE: CVE-2023-35841 (🔍)
GCVE (CVE): GCVE-0-2023-35841
GCVE (VulDB): GCVE-100-264221
EUVD: 🔍

Entryinfo

Created: 05/14/2024 17:18
Updated: 07/29/2025 00:38
Changes: 05/14/2024 17:18 (64), 07/28/2025 23:31 (2), 07/29/2025 00:38 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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