#VU51243 Out-of-bounds read in yubihsm-shell - CVE-2021-27217
Published: March 5, 2021
Vulnerability identifier: #VU51243
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-27217
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
yubihsm-shell
yubihsm-shell
Software vendor:
Yubico
Yubico
Description
The vulnerability allows a remote attacker to perform denial of service (DoS) attack.
The vulnerability exists due to a boundary condition when validating the length of authenticated messages during device communication. A remote attacker can send specially crafted data to the system and cause the yubihsm library to fail with a “Not enough space” error.
Remediation
Install updates from vendor's website.