{"id":"GHSA-2fhr-8r8r-qp56","aliases":[],"url":"https://o3.security/vulnerability/GHSA-2fhr-8r8r-qp56","summary":"ZendFramework Information Disclosure and Insufficient Entropy vulnerability","details":"In Zend Framework, `Zend_Captcha_Word` (v1) and `Zend\\Captcha\\Word` (v2) generate a \"word\" for a CAPTCHA challenge by selecting a sequence of random letters from a character set. Prior to this advisory, the selection was performed using PHP's `internal array_rand()` function. This function does not generate sufficient entropy due to its usage of `rand()` instead of more cryptographically secure methods such as `openssl_pseudo_random_bytes()`. This could potentially lead to information disclosure should an attacker be able to brute force the random number generation.","published":"2024-06-07T20:37:45Z","modified":"2024-12-04T05:40:33.932306Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"zendframework/zendframework","fixedVersion":"2.4.9"}],"fix":{"url":"https://github.com/zendframework/zendframework/commit/ced8ff93ef892a64885c03f5dfab3f788a219709","label":"zendframework/zendframework@ced8ff9"},"references":[{"type":"WEB","url":"https://github.com/zendframework/zendframework/commit/ced8ff93ef892a64885c03f5dfab3f788a219709"},{"type":"WEB","url":"https://framework.zend.com/security/advisory/ZF2015-09"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/zendframework/zendframework/ZF2015-09.yaml"},{"type":"PACKAGE","url":"https://github.com/zendframework/zendframework"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2024-12-04T05:40:33.932306Z"}}