CVE-2021-31924

Katalog CVE

CVSS 6.8 · Medium EPSS 0,33%

Kerentanan Improper Authentication pada yubico pam-u2f, fedoraproject fedora. Skor CVSS 3.1 6.8 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

26 Mei 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

6.8 (Medium), sumber NVD
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-287: Improper Authentication

EPSS (30 hari)

0,33% peluang dieksploitasi; lebih tinggi dari 24,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://developers.yubico.com/pam-u2f/ product · advisory vendor
• https://www.yubico.com/support/security-advisories/ysa-2021-03 advisory vendor
• https://security.gentoo.org/glsa/202208-11 advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CRBVOZEMVO72F...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IL3I5AKECLMK4...