CVEvulnerability
CVE-2021-43399
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-12-08
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 7.8 HIGH — AV:N/AC:L/Au:N/C:N/I:N/A:C
- Weaknesses
- CWE-787
Description
The Yubico YubiHSM YubiHSM2 library 2021.08, included in the yubihsm-shell project, does not properly validate the length of some operations including SSH signing requests, and some data operations received from a YubiHSM 2 device.
Affected configurations
• yubico yubihsm 2 software development kit (<= 2021.08)
Related
Weakness · CWE (1)
- CWE-787 Out-of-bounds Write weakness
References
- https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/ Exploit, Third Party Advisory
- https://www.yubico.com/support/security-advisories/ysa-2021-04/ Vendor Advisory
- https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/ Exploit, Third Party Advisory
- https://www.yubico.com/support/security-advisories/ysa-2021-04/ Vendor Advisory