Vulnerability · Published Dec 8, 2021 · Assigned by mitre
CVE-2021-43399
High 7.5
In plain English
A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 73% of all known vulnerabilities).
Severity (CVSS NVD)7.5High
Exploit odds (30 days)1.4%top 27.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 products (as reported)
References
- https://www.yubico.com/support/security-advisories/ysa-2021-04/ x_refsource_MISC
- https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/ x_refsource_MISC