GHSA-4vpc-5jx4-cfqg
User enumeration leak using switch user functionality in Symfony
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | symfony/security-http | >= 4.1.0, < 4.2.12 | 4.2.12 |
| Packagist | symfony/security-http | >= 4.3.0, < 4.3.8 | 4.3.8 |
| Packagist | symfony/symfony | >= 4.1.0, < 4.2.12 | 4.2.12 |
| Packagist | symfony/symfony | >= 4.3.0, < 4.3.8 | 4.3.8 |
Details
As written in the advisory (Markdown source, shown as plain text).
An issue was discovered in Symfony 4.2.0 to 4.2.11 and 4.3.0 to 4.3.7. The ability to enumerate users was possible due to different handling depending on whether the user existed when making unauthorized attempts to use the switch users functionality. This is related to symfony/security.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2019-18886
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2019-18886.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2019-18886.yaml
- https://github.com/symfony/symfony/releases/tag/v4.3.8
- https://symfony.com/blog/cve-2019-18886-prevent-user-enumeration-using-switch-user-functionality
- https://symfony.com/blog/symfony-4-3-8-released
- https://symfony.com/cve-2019-18886