{"id":"GHSA-848f-mph5-9pm9","aliases":[],"url":"https://o3.security/vulnerability/GHSA-848f-mph5-9pm9","summary":"Zendframework Potential 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":"2024-06-07T22:27:02Z","modified":"2024-12-04T05:39:36.296019Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"zendframework/zendframework1","fixedVersion":"1.12.17"}],"fix":null,"references":[{"type":"WEB","url":"https://framework.zend.com/security/advisory/ZF2015-09"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/zendframework/zendframework1/ZF2015-09.yaml"},{"type":"PACKAGE","url":"https://github.com/zendframework/zf1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2024-12-04T05:39:36.296019Z"}}