Yubico pam-u2f before 1.1.1 has a logic issue that, depending on the pam-u2f configuration and the application used, could lead to a local PIN bypass. This issue does not allow user presence (touch) or cryptographic signature verification to be bypassed, so an attacker would still need to physically possess and interact with the YubiKey or another enrolled authenticator. If pam-u2f is configured to require PIN authentication, and the application using pam-u2f allows the user to submit NULL as the PIN, pam-u2f will attempt to perform a FIDO2 authentication without PIN. If this authentication is successful, the PIN requirement is bypassed.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2021-05-25T23:40:11
Updated: 2024-08-03T23:10:31.291Z
Reserved: 2021-04-30T00:00:00
Link: CVE-2021-31924
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-05-26T00:15:08.490
Modified: 2024-11-21T06:06:31.330
Link: CVE-2021-31924
Redhat
No data.