Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow
Published Mar 17, 2019
6.8
MEDIUMCVSS 3.0
EPSS 0.50%
Description
Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to attempt to execute malicious code using a crafted USB device masquerading as a security token on a computer where the affected library is currently in use. It is not possible to perform this attack with a genuine YubiKey.
Affected products
No data.
Configuration 1
- 1.1.6
Configuration 2
- 9.0
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:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:L/AC:L/Au:N/C:P/I:P/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
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.50% (0.00499) | 40.51th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.50% (0.00499) | 38.59th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.13% (0.00132) | 30.22th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.19% (0.00191) | 57.82th | v3 (v2023.03.01) |
| Mar 10, 2024 | 0.19% (0.00191) | 55.79th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.15% (0.00147) | 48.93th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.11% (0.01108) | 29.61th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.45% (0.01454) | 32.67th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.45% (0.01454) | 0.00th | v1 |
References (6)
- https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/ x_refsource_MISC
- https://developers.yubico.com/libu2f-host/Release_Notes.html x_refsource_CONFIRMRelease NotesVendor Advisory
- https://seclists.org/bugtraq/2019/Feb/23 x_refsource_MISCMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202004-15 vendor-advisoryx_refsource_GENTOO
- https://www.debian.org/security/2019/dsa-4389 x_refsource_MISCThird Party Advisory
- https://www.yubico.com/support/security-advisories/ysa-2019-01/ x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://blog.inhq.net/posts/yubico-libu2f-host-vuln-part1/ | x_refsource_MISC | |
| https://developers.yubico.com/libu2f-host/Release_Notes.html | x_refsource_CONFIRMRelease NotesVendor Advisory | |
| https://seclists.org/bugtraq/2019/Feb/23 | x_refsource_MISCMailing ListThird Party Advisory | |
| https://security.gentoo.org/glsa/202004-15 | vendor-advisoryx_refsource_GENTOO | |
| https://www.debian.org/security/2019/dsa-4389 | x_refsource_MISCThird Party Advisory | |
| https://www.yubico.com/support/security-advisories/ysa-2019-01/ | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.