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In Yubico pam-u2f 1.0.7, when configured with debug and a custom debug log file is set using debug_file, that file descriptor is not closed when a new process is spawned. This leads to the file descriptor being inherited into the child process; the child process can then read from and write to it. This can leak sensitive information and also, if written to, be used to fill the disk or plant misinformation.
| 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-host-develUpgrade pam_u2fUpgrade libu2f-host-docUpgrade u2f-hostUpgrade libu2f-host0 | Jul 5, 2019 | Jun 4, 2019 |
| Ubuntu | — | No solution exists | Jun 26, 2025 | Jun 4, 2019 |
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