Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.006
EPSS Ranking 68.7%
CVSS Severity
CVSS v3 Score 4.4
CVSS v2 Score 3.5
References
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln2
- https://github.com/Yubico/yubihsm-shell/releases
- https://www.yubico.com/support/security-advisories/ysa-2021-01/
- https://blog.inhq.net/posts/yubico-libyubihsm-vuln2
- https://github.com/Yubico/yubihsm-shell/releases
- https://www.yubico.com/support/security-advisories/ysa-2021-01/
Products affected by CVE-2021-27217
-
cpe:2.3:a:yubico:yubihsm-shell:2.0.0
-
cpe:2.3:a:yubico:yubihsm-shell:2.0.1
-
cpe:2.3:a:yubico:yubihsm-shell:2.0.2
-
cpe:2.3:a:yubico:yubihsm-shell:2.0.3