{"id":"CVE-2017-12871","aliases":["GHSA-ww3w-592j-5qrw"],"url":"https://o3.security/vulnerability/CVE-2017-12871","summary":"SimpleSAMLphp Incorrect IV generation for encryption","details":"The aesEncrypt method in lib/SimpleSAML/Utils/Crypto.php in SimpleSAMLphp 1.14.x through 1.14.11 makes it easier for context-dependent attackers to bypass the encryption protection mechanism by leveraging use of the first 16 bytes of the secret key as the initialization vector (IV).","published":"2017-09-01T21:29:00.530Z","modified":"2026-07-08T05:49:31.967156938Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"simplesamlphp/simplesamlphp","fixedVersion":"1.14.12"}],"fix":{"url":"https://github.com/simplesamlphp/simplesamlphp/commit/77df6a932d46daa35e364925eb73a175010dc904","label":"simplesamlphp/simplesamlphp@77df6a9"},"references":[{"type":"FIX","url":"https://github.com/simplesamlphp/simplesamlphp/commit/77df6a932d46daa35e364925eb73a175010dc904"},{"type":"FIX","url":"https://simplesamlphp.org/security/201703-02"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:49:31.967156938Z"}}