CVE-2020-24388

An issue was discovered in the _send_secure_msg() function of yubihsm-shell through 2.0.2. The function does not validate the embedded length field of a message received from the device. This could lead to an oversized memcpy() call that will crash the running process. This could be used by an attacker to cause a denial of service.

• CWE-20
• CWE-787

• https://blog.inhq.net/posts/yubico-libyubihsm-vuln/Exploit, Third Party Advisory
• https://developers.yubico.com/yubihsm-shell/Vendor Advisory
• https://github.com/Yubico/yubihsm-shellThird Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/
• https://www.yubico.com/support/security-advisories/ysa-2020-06/Vendor Advisory
• https://blog.inhq.net/posts/yubico-libyubihsm-vuln/Exploit, Third Party Advisory
• https://developers.yubico.com/yubihsm-shell/Vendor Advisory
• https://github.com/Yubico/yubihsm-shellThird Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/
• https://www.yubico.com/support/security-advisories/ysa-2020-06/Vendor Advisory

Published

Oct 19, 2020

Last Modified

Jun 17, 2026

Status

Modified

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