Improper access control in Yubico YubiKey 5 NFC



Published: 2020-07-09
Risk Low
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2020-15001
CWE-ID CWE-284
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Subscribe 		YubiKey 5 NFC
Hardware solutions / Other hardware appliances

Vendor Yubico

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper access control

EUVDB-ID: #VU29614

Risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:U/RC:C]

CVE-ID: CVE-2020-15001

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a local attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to the access code is not checked when updating NFC-specific components of the OTP configurations. An attacker with physical can bypass implemented security restrictions and perform possible changes to the NDEF prefix as well as which slot is presented over NFC without an access code check.

Note: This vulnerability affects the following versions of YubiKey 5 NFC:

  • 5.0.0 to 5.2.6
  • 5.3.0 to 5.3.1

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

YubiKey 5 NFC: 5.3.0 - 5.3.1

External links

http://www.yubico.com/support/security-advisories/ysa-2020-04


Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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