{"id":"GHSA-77mr-wc79-m8j3","summary":"PHPMailer untrusted code may be run from an overridden address validator","details":"If a function is defined that has the same name as the default built-in email address validation scheme (`php`), it will be called in default configuration as when no validation scheme is provided, the default scheme's callable `php` was being called. If an attacker is able to inject such a function into the application (a much bigger issue), it will be called whenever an email address is validated, such as when calling `validateAddress()`.\n\n### Impact\nLow impact – exploitation requires that an attacker can already inject code into an application, but it provides a trigger pathway.\n\n### Patches\nThis is patched in PHPMailer 6.5.0 by denying the use of simple strings as validator function names, which is a very minor BC break.\n\n### Workarounds\nInject your own email validator function.\n\n### References\nReported by [Vikrant Singh Chauhan](mailto:vi@hackberry.xyz) via [huntr.dev](https://www.huntr.dev/).\n[CVE-2021-3603](https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-3603)\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Open an issue in [the PHPMailer project](https://github.com/PHPMailer/PHPMailer)\n* [Email us](mailto:phpmailer@synchromedia.co.uk).\n","aliases":["BIT-phpmailer-2021-3603","CVE-2021-3603"],"modified":"2024-02-17T05:35:36.523540Z","published":"2021-06-22T15:18:02Z","database_specific":{"nvd_published_at":"2021-06-17T12:15:00Z","cwe_ids":["CWE-74","CWE-829"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2021-06-16T19:49:12Z"},"references":[{"type":"WEB","url":"https://github.com/PHPMailer/PHPMailer/security/advisories/GHSA-77mr-wc79-m8j3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3603"},{"type":"WEB","url":"https://github.com/PHPMailer/PHPMailer/commit/45f3c18dc6a2de1cb1bf49b9b249a9ee36a5f7f3"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/phpmailer/phpmailer/CVE-2021-3603.yaml"},{"type":"PACKAGE","url":"https://github.com/PHPMailer/PHPMailer"},{"type":"WEB","url":"https://github.com/PHPMailer/PHPMailer/releases/tag/v6.5.0"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YRMWGA4VTMXFB22KICMB7YMFZNFV3EJ"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FJYSOFCUBS67J3TKR74SD3C454N7VTYM"},{"type":"WEB","url":"https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-3603"},{"type":"WEB","url":"https://www.huntr.dev/bounties/1-PHPMailer/PHPMailer"}],"affected":[{"package":{"name":"phpmailer/phpmailer","ecosystem":"Packagist","purl":"pkg:composer/phpmailer/phpmailer"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.0"}]}],"versions":["v5.2.10","v5.2.11","v5.2.12","v5.2.13","v5.2.14","v5.2.15","v5.2.16","v5.2.17","v5.2.18","v5.2.19","v5.2.2","v5.2.20","v5.2.21","v5.2.22","v5.2.23","v5.2.24","v5.2.25","v5.2.26","v5.2.27","v5.2.28","v5.2.4","v5.2.5","v5.2.6","v5.2.7","v5.2.8","v5.2.9","v6.0.0","v6.0.0rc1","v6.0.0rc2","v6.0.0rc3","v6.0.0rc4","v6.0.0rc5","v6.0.1","v6.0.2","v6.0.3","v6.0.4","v6.0.5","v6.0.6","v6.0.7","v6.1.0","v6.1.1","v6.1.2","v6.1.3","v6.1.4","v6.1.5","v6.1.6","v6.1.7","v6.1.8","v6.2.0","v6.3.0","v6.4.0","v6.4.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/06/GHSA-77mr-wc79-m8j3/GHSA-77mr-wc79-m8j3.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}