CVE-2023-35841: winflash Permission Flaw

Description

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.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-732 CWE-732

CWE-782 CWE-782

Affected Products

Vendor	Product	Versions
phoenixtech	winflash	< 4.5.0.0

References

Advisories & Patches

https://phoenixtech.com/phoenix-security-notifications/cve-2023-35841/ https://www.phoenix.com/security-notifications/cve-2023-35841/

Exploits

https://blogs.vmware.com/security/2023/10/hunting-vulnerable-kernel-drivers.html https://blogs.vmware.com/security/2023/10/hunting-vulnerable-kernel-drivers.html

Other References

https://jvn.jp/en/vu/JVNVU93886750/index.html https://jvn.jp/en/vu/JVNVU93886750/index.html

Frequently Asked Questions

What is CVE-2023-35841? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-35841? +

CVE-2023-35841 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-35841? +

CVE-2023-35841 affects products from phoenixtech, specifically: winflash. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-35841? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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