Yubico pam-u2f 1.0.7 attempts parsing of the configured authfile (default $HOME/.config/Yubico/u2f_keys) as root (unless openasuser was enabled), and does not properly verify that the path lacks symlinks pointing to other files on the system owned by root. If the debug option is enabled in the PAM configuration, part of the file contents of a symlink target will be logged, possibly revealing sensitive information.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 4, 2019 |
| Debian | — | Upgrade pam-u2f | Jul 30, 2024 | Jun 4, 2019 |
| Suse | — | Upgrade libu2f-host0Upgrade libu2f-host-develUpgrade u2f-hostUpgrade pam_u2fUpgrade libu2f-host-doc | Jul 5, 2019 | Jun 4, 2019 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Jun 4, 2019 |
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