Improper Input Validation in YubiHSM2 Library by Yubico
CVE-2021-43399

7.5HIGH

Key Information:

Vendor

Yubico

Status
Yubihsm 2 Software Development Kit
Vendor
CVE Published:
8 December 2021

What is CVE-2021-43399?

The YubiHSM YubiHSM2 library version 2021.08, part of the yubihsm-shell project, is susceptible to improper input validation. This vulnerability arises from the failure to validate the length of specific operations, including SSH signing requests and various data operations received from a YubiHSM 2 device. This could potentially lead to unintended behavior, compromising data security and functionality.

References

https://www.yubico.com/support/security-advisories/ysa-20...
x_refsource_MISC
https://blog.inhq.net/posts/yubico-yubihsm-shell-vuln3/
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.