CVE-2021-46390 — MEDIUM (6.8)

Vulnerability Description

An access control issue in the authentication module of Lexar_F35 v1.0.34 allows attackers to access sensitive data and cause a Denial of Service (DoS). An attacker without access to securely protected data on a secure USB flash drive can bypass user authentication without having any information related to the password of the registered user. The secure USB flash drive transmits the password entered by the user to the authentication module in the drive after the user registers a password, and then the input password is compared with the registered password stored in the authentication module. Subsequently, the module returns the comparison result for the authentication decision. Therefore, an attacker can bypass password authentication by analyzing the functions that return the password verification or comparison results and manipulate the authentication result values. Accordingly, even if attackers enter an incorrect password, they can be authenticated as a legitimate user and can therefore exploit functions of the secure USB flash drive by manipulating the authentication result values.

CVSS Score

6.8

MEDIUM

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

Attack Vector

PHYSICAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Lexar	F35 Firmware	1.0.34.0
Lexar	F35	-

Related Weaknesses (CWE)

CWE-287

References

https://github.com/bosslabdcu/Vulnerability-Reporting/security/advisories/GHSA-fExploitThird Party Advisory
https://www.amazon.in/Lexar-LJDF35-128BNL-JumpDrive-Fingerprint-Silver/dp/B07GSMProductThird Party Advisory
https://www.ebay.com/itm/265316509212?hash=item3dc618a61c:g:YO0AAOSwoPJeNNQNProductThird Party Advisory
https://www.lexar.com/en/product/lexar-jumpdrive-fingerprint-f35-usb-3-0-flash-dProductVendor Advisory
https://github.com/bosslabdcu/Vulnerability-Reporting/security/advisories/GHSA-fExploitThird Party Advisory
https://www.amazon.in/Lexar-LJDF35-128BNL-JumpDrive-Fingerprint-Silver/dp/B07GSMProductThird Party Advisory
https://www.ebay.com/itm/265316509212?hash=item3dc618a61c:g:YO0AAOSwoPJeNNQNProductThird Party Advisory
https://www.lexar.com/en/product/lexar-jumpdrive-fingerprint-f35-usb-3-0-flash-dProductVendor Advisory

FAQ

What is CVE-2021-46390?

CVE-2021-46390 is a vulnerability with a CVSS score of 6.8 (MEDIUM). An access control issue in the authentication module of Lexar_F35 v1.0.34 allows attackers to access sensitive data and cause a Denial of Service (DoS). An attacker without access to securely protecte...

How severe is CVE-2021-46390?

CVE-2021-46390 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-46390?

Check the references section above for vendor advisories and patch information. Affected products include: Lexar F35 Firmware, Lexar F35.