GHSA-77mr-wc79-m8j3
Suggest an improvement- Source
- https://github.com/advisories/GHSA-77mr-wc79-m8j3
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/06/GHSA-77mr-wc79-m8j3/GHSA-77mr-wc79-m8j3.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-77mr-wc79-m8j3
- Aliases
- Published
- 2021-06-22T15:18:02Z
- Modified
- 2024-02-17T05:42:33.365606Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- 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 callablephpwas 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 callingvalidateAddress().Impact
Low impact – exploitation requires that an attacker can already inject code into an application, but it provides a trigger pathway.
Patches
This 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.
Workarounds
Inject your own email validator function.
References
Reported by Vikrant Singh Chauhan via huntr.dev. CVE-2021-3603
For more information
If you have any questions or comments about this advisory: * Open an issue in the PHPMailer project * Email us.
- 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
-
- https://github.com/PHPMailer/PHPMailer/security/advisories/GHSA-77mr-wc79-m8j3
- https://nvd.nist.gov/vuln/detail/CVE-2021-3603
- https://github.com/PHPMailer/PHPMailer/commit/45f3c18dc6a2de1cb1bf49b9b249a9ee36a5f7f3
- https://github.com/FriendsOfPHP/security-advisories/blob/master/phpmailer/phpmailer/CVE-2021-3603.yaml
- https://github.com/PHPMailer/PHPMailer
- https://github.com/PHPMailer/PHPMailer/releases/tag/v6.5.0
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YRMWGA4VTMXFB22KICMB7YMFZNFV3EJ
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FJYSOFCUBS67J3TKR74SD3C454N7VTYM
- https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-3603
- https://www.huntr.dev/bounties/1-PHPMailer/PHPMailer
Affected packages
Packagist / phpmailer/phpmailer
Package
- Name
- phpmailer/phpmailer
- Purl
- pkg:composer/phpmailer/phpmailer
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed6.5.0