Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Yubico | Yubihsm 2 Software Development Kit | <= 2021.08 |
Related Weaknesses (CWE)
References
- https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/ExploitThird Party Advisory
- https://www.yubico.com/support/security-advisories/ysa-2021-04/Vendor Advisory
- https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/ExploitThird Party Advisory
- https://www.yubico.com/support/security-advisories/ysa-2021-04/Vendor Advisory
FAQ
What is CVE-2021-43399?
CVE-2021-43399 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 re...
How severe is CVE-2021-43399?
CVE-2021-43399 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-43399?
Check the references section above for vendor advisories and patch information. Affected products include: Yubico Yubihsm 2 Software Development Kit.