{"id":"CVE-2020-24388","aliases":["EUVD-2020-17120","GHSA-rfxf-4r4p-5x86"],"status":"published","title":"An issue was discovered in the _send_secure_msg() function of yubihsm-shell through 2.0.2. The...","description":"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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01755,"percentile":0.78114,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20","CWE-787"],"published":"2020-10-19T19:41:33Z","modified":"2026-10-20T10:52:51Z","products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"yubico","product":"yubihsm-shell"}],"references":[{"url":"https://github.com/Yubico/yubihsm-shell","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://developers.yubico.com/yubihsm-shell/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://www.yubico.com/support/security-advisories/ysa-2020-06/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://blog.inhq.net/posts/yubico-libyubihsm-vuln/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-24388"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Y77KQJW76M3PFOBFLBT6DLH2NWHYRNZO/"},{"url":"https://github.com/advisories/GHSA-rfxf-4r4p-5x86"}],"sources":{"cve":[{"id":"CVE-2020-24388","description":"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.","status":"published","published":"2020-10-19T19:41:33Z","modified":"2024-08-04T15:12:08.714Z","updated_at":"2026-11-02T14:35:54.468882Z"}],"euvd":[{"id":"EUVD-2020-17120","description":"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.","status":"published","published":"2020-10-19T19:41:33Z","modified":"2024-08-04T15:12:08Z","updated_at":"2026-11-03T03:07:20.249898Z"}],"ghsa":[{"id":"GHSA-rfxf-4r4p-5x86","title":"An issue was discovered in the _send_secure_msg() function of yubihsm-shell through 2.0.2. The...","description":"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.","status":"published","published":"2022-05-24T17:31:13Z","modified":"2023-01-29T05:04:10Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:45:29.424402Z"}],"nvd":[{"id":"CVE-2020-24388","description":"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.","status":"published","published":"2020-10-19T20:15:12.993Z","modified":"2026-06-17T03:05:28.737Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20","CWE-787"],"updated_at":"2026-11-02T14:06:20.704992Z"}],"osv":[{"id":"CVE-2020-24388","description":"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.","status":"published","published":"2020-10-19T20:15:12.993Z","modified":"2026-10-20T10:52:51.410761003Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:15.879068Z"}]}}