CVE Vulnerability

CVE-2021-27217

An issue was discovered in the _send_secure_msg() function of Yubico yubihsm-shell through 2.0.3. The function does not correctly validate the embedded length field of an authenticated message received from the device. Out-of-bounds reads performed by aes_remove_padding() can crash the running process, depending on the memory layout. This could be used by an attacker to cause a client-side denial of service. The yubihsm-shell project is included in the YubiHSM 2 SDK product.

3.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 6.8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

4.4 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 0.7 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://www.yubico.com/support/security-advisories/ysa-2021-01/ Vendor Advisory
https://github.com/Yubico/yubihsm-shell/releases Release Notes Third Party Advisory
https://blog.inhq.net/posts/yubico-libyubihsm-vuln2 Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:yubico:yubihsm-shell:*:*:*:*:*:*:*:*
Information

Published : 2021-03-04 06:15

Updated : 2021-03-26 08:07

NVD link : CVE-2021-27217

Mitre link : CVE-2021-27217

Products Affected
No products.
CWE
CWE-125

Out-of-bounds Read