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.

CVSS v3 4.4 MEDIUM
CVSS v2.0 3.5 LOW

4.4^/10

CVSS v3 : MEDIUM

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

3.5^/10

CVSS v2.0 : LOW

Vector : AV:N/AC:M/Au:S/C:N/I:N/A:P

Exploitability : 6.8 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

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

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2021-03-04 18:15

Updated : 2024-02-28 18:08

NVD link : CVE-2021-27217

Mitre link : CVE-2021-27217

CVE.ORG link : CVE-2021-27217

JSON object : View

Products Affected

yubico

yubihsm-shell

CWE

CWE-125

Out-of-bounds Read

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