GitHub Advisoryadvisory · Packagist
GHSA-5pv8-ppvj-4h68 Prevent user enumeration using Guard or the new Authenticator-based Security
MEDIUM
Official page ↗
- Aliases
- CVE-2021-21424
- Ecosystem
- Packagist
- Packages
- symfony/security, symfony/security-guard, symfony/security-core, lexik/jwt-authentication-bundle, symfony/maker-bundle, symfony/security-http, symfony/symfony
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-200, CWE-203
- Reviewed
- 2021-05-13
Affected packages
• Packagist symfony/security: >= 5.0.0, < 5.2.8 → fixed in 5.2.8
• Packagist symfony/security-guard: >= 2.8.0, < 3.4.48 → fixed in 3.4.48
• Packagist symfony/security-guard: >= 4.0.0, < 4.4.23 → fixed in 4.4.23
• Packagist symfony/security-guard: >= 5.0.0, < 5.2.8 → fixed in 5.2.8
• Packagist symfony/security-core: >= 2.8.0, < 3.4.48 → fixed in 3.4.48
• Packagist symfony/security-core: >= 4.0.0, < 4.4.23 → fixed in 4.4.23
• Packagist symfony/security-core: >= 5.0.0, < 5.2.8 → fixed in 5.2.8
• Packagist lexik/jwt-authentication-bundle: >= 2.0.0, < 2.10.7 → fixed in 2.10.7
• Packagist lexik/jwt-authentication-bundle: >= 2.11.0, < 2.11.3 → fixed in 2.11.3
• Packagist symfony/maker-bundle: >= 1.27.0, < 1.29.2 → fixed in 1.29.2
• Packagist symfony/maker-bundle: >= 1.30.0, < 1.31.1 → fixed in 1.31.1
• Packagist symfony/security-http: >= 5.1.0, < 5.2.8 → fixed in 5.2.8
• Packagist symfony/security: >= 2.8.0, < 3.4.49 → fixed in 3.4.49
• Packagist symfony/security: >= 4.0.0, < 4.4.24 → fixed in 4.4.24
• Packagist symfony/symfony: >= 2.8.0, < 3.4.49 → fixed in 3.4.49
• Packagist symfony/symfony: >= 4.0.0, < 4.4.24 → fixed in 4.4.24
• Packagist symfony/symfony: >= 5.0.0, < 5.2.9 → fixed in 5.2.9
Description
Description
-----------
The ability to enumerate users was possible without relevant permissions due to different exception messages depending on whether the user existed or not. It was also possible to enumerate users by using a timing attack, by comparing time elapsed when authenticating an existing user and authenticating a non-existing user.
Resolution
----------
We now ensure that 403s are returned whether the user exists or not if the password is invalid or if the user does not exist.
The patch for this issue is available here for branch 3.4.
Credits
-------
I would like to thank James Isaac and Mathias Brodala for reporting the issue and Robin Chalas for fixing the issue.
Related
Alias · CVE (1)
- CVE-2021-21424 Symfony is a PHP framework for web and console applications and a set of reusable PHP components. vulnerability
References
- https://github.com/symfony/symfony/security/advisories/GHSA-5pv8-ppvj-4h68 web
- https://nvd.nist.gov/vuln/detail/CVE-2021-21424 advisory
- https://github.com/symfony/symfony/commit/2a581d22cc621b33d5464ed65c4bc2057f72f011 web
- https://symfony.com/cve-2021-21424 web
- https://lists.fedoraproject.org/archives/list/[email protected]/message/VRUS2H2SSOQWNLBD35SKIWIDQEMV2PD3 web
- https://lists.fedoraproject.org/archives/list/[email protected]/message/UC7BND775DVZDQT3RMGD2HVB2PKLJDJW web
- https://lists.fedoraproject.org/archives/list/[email protected]/message/RH7TMM5CHQYBFFGXWRPJDPB3SKCZXI2M web
- https://lists.fedoraproject.org/archives/list/[email protected]/message/KENRNLB3FYXYGDWRBH2PDBOZZKOD7VY4 web
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VRUS2H2SSOQWNLBD35SKIWIDQEMV2PD3 web
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UC7BND775DVZDQT3RMGD2HVB2PKLJDJW web
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RH7TMM5CHQYBFFGXWRPJDPB3SKCZXI2M web
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KENRNLB3FYXYGDWRBH2PDBOZZKOD7VY4 web
- https://lists.debian.org/debian-lts-announce/2023/07/msg00014.html web
- https://github.com/symfony/symfony package
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2021-21424.yaml web
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2021-21424.yaml web
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2021-21424.yaml web
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-guard/CVE-2021-21424.yaml web
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/maker-bundle/CVE-2021-21424.yaml web
- https://github.com/FriendsOfPHP/security-advisories/blob/master/lexik/jwt-authentication-bundle/CVE-2021-21424.yaml web