Medium severity4.4NVD Advisory· Published May 10, 2021· Updated Jun 17, 2026
CVE-2021-32489
CVE-2021-32489
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 because response_msg.st.len=8 can be accepted but triggers an integer overflow, which causes CRYPTO_cbc128_decrypt (in OpenSSL) to encounter an undersized buffer and experience a segmentation fault. The yubihsm-shell project is included in the YubiHSM 2 SDK product.
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Affected products
2- Range: <=2.0.3
Patches
Vulnerability mechanics
References
1- blog.inhq.net/posts/yubico-libyubihsm-vuln2/nvdExploitThird Party Advisory
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