CVEs-PoC/2021/CVE-2021-27217.md

CVE-2021-27217

Description

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.

POC

Reference

• https://blog.inhq.net/posts/yubico-libyubihsm-vuln2
• https://blog.inhq.net/posts/yubico-libyubihsm-vuln2

Github

No PoCs found on GitHub currently.