{"id":"CVE-2021-32489","details":"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.","modified":"2026-07-09T00:05:47.363265Z","published":"2021-05-10T22:15:06.213Z","references":[{"type":"EVIDENCE","url":"https://blog.inhq.net/posts/yubico-libyubihsm-vuln2/#second-attack-variant-cve-pending"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/yubico/yubihsm-shell","events":[{"introduced":"0"},{"last_affected":"a2d66a90426dddac0d2060d2b4fce5c7545a6bc8"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"2.0.3"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:yubico:yubihsm-shell:*:*:*:*:*:*:*:*"}}],"versions":["2.0.3","2.0.2","2.0.1","2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32489.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H"}]}