CVE-2021-43399
Last modified
CVE-2021-43399 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 1.37% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Yubico | Yubihsm 2 Software Development Kit | <= 2021.08 |
References
- https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/Exploit, Third Party Advisory
- https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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