CVE-2021-43399

HIGH

Yubico YubiHSM YubiHSM2 library 2021.08 - Info Disclosure

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Exploit, Third Party Advisory x_refsource_misc
https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/

Scores

CVSS v3 7.5
EPSS 0.0137
EPSS Percentile 68.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-787
Status published
Products (1)
yubico/yubihsm_2_software_development_kit < 2021.08
Published Dec 08, 2021
Tracked Since Feb 18, 2026