CVE-2021-43399 affects the Yubico YubiHSM2 library (version 2021.08) within the yubihsm-shell project, stemming from insufficient validation of operation lengths, specifically for SSH signing and certain data operations from a YubiHSM 2 device. This vulnerability carries a CVSS score of 7.5 (High), indicating a network-based attack with low complexity that could lead to a denial of service. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2021.08CPE matchmatch criteria | cpe:2.3:a:yubico:yubihsm_2_software_development_kit:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.