PT-2023-6917 · Phoenix · Winflash Driver

Takahiro Haruyama · Published 2023-06-28 · Updated 2025-09-25 · CVE-2023-35841

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions WinFlash Driver versions prior to 4.5.0.0 TdkLib64.sys (affected versions not specified)

Description The issue is related to insufficient access control in the Phoenix WinFlash Driver on Windows, allowing privilege escalation and modification of system firmware. This is due to exposed IOCTL with insufficient access control. The vulnerability may allow an attacker to read, modify, or delete data.

Recommendations For WinFlash Driver versions prior to 4.5.0.0, update to version 4.5.0.0 or later to resolve the issue. For TdkLib64.sys, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

LPE

Incorrect Permission

Weakness Enumeration

CWE-732

CWE-782

Related Identifiers

BDU:2023-07935

CVE-2023-35841

Affected Products

Winflash Driver

References · 19

• 🔥 https://blogs.vmware.com/security/2023/10/hunting-vulnerable-kernel-drivers.html · Exploit
• https://osv.dev/vulnerability/CVE-2023-35841 · Vendor Advisory
• https://phoenixtech.com/phoenix-security-notifications/cve-2023-35841 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-35841 · Security Note
• https://bdu.fstec.ru/vul/2023-07935 · Security Note
• https://phoenix.com/security-notifications/cve-2023-35841 · Vendor Advisory
• https://github.com/TakahiroHaruyama/VDR/blob/main/result_firmware.org · Note
• https://anti-malware.ru/news/2023-11-03-111332/42236 · Note
• https://sensorstechforum.com/cve-2023-20598-34-windows-drivers-vulnerable · Note
• https://t.me/cvenotify/79768 · Telegram Post
• https://thehackernews.com/2023/11/researchers-find-34-windows-drivers.html · Note
• https://jvn.jp/en/vu/JVNVU93886750/index.html · Note
• http://jvn.jp/en/vu/JVNVU93886750/index.html · Note
• https://t.me/cveNotify/130072 · Telegram Post
• https://herdprotect.com/knowledgebase_resource.aspx?sha1=7fbf5da4ab55605712dfcb57e30d9e724ad76cda · Note