In check_user_token in util.c in the Yubico PAM module (aka pam_yubico) 2.18 through 2.25, successful logins can leak file descriptors to the auth mapping file, which can lead to information disclosure (serial number of a device) and/or DoS (reaching the maximum number of file descriptors)
Published Apr 4, 2018
8.2
HIGHCVSS 3.0
EPSS 1.42%
Description
In check_user_token in util.c in the Yubico PAM module (aka pam_yubico) 2.18 through 2.25, successful logins can leak file descriptors to the auth mapping file, which can lead to information disclosure (serial number of a device) and/or DoS (reaching the maximum number of file descriptors).
Affected products
No data.
- ≥ 2.18 · ≤ 2.25
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
AV:N/AC:L/Au:N/C:P/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.42% (0.01416) | 71.80th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.42% (0.01416) | 71.58th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.12% (0.00121) | 46.97th | v3 (v2023.03.01) |
| May 24, 2024 | 0.12% (0.00121) | 46.42th | v3 (v2023.03.01) |
| May 10, 2024 | 0.11% (0.00115) | 44.88th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.10% (0.00097) | 39.35th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.13% (0.00125) | 45.82th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.19% (0.00192) | 56.08th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.18% (0.00181) | 53.45th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (3)
- https://bugzilla.opensuse.org/show_bug.cgi?id=1088027 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://github.com/Yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba x_refsource_CONFIRMPatch
- https://github.com/Yubico/yubico-pam/issues/136 x_refsource_CONFIRMIssue TrackingThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://bugzilla.opensuse.org/show_bug.cgi?id=1088027 | x_refsource_CONFIRMIssue TrackingThird Party Advisory | |
| https://github.com/Yubico/yubico-pam/commit/0f6ceabab0a8849b47f67d727aa526c2656089ba | x_refsource_CONFIRMPatch | |
| https://github.com/Yubico/yubico-pam/issues/136 | x_refsource_CONFIRMIssue TrackingThird Party Advisory |
Change history (0)
No recorded changes yet.