CVE-2021-21424 – symfony/security-guard

Package

Manager: composer
Name: symfony/security-guard
Vulnerable Version: >=2.8.0 <3.4.48 || >=4.0.0 <4.4.23 || >=5.0.0 <5.2.8

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00207 pctl0.43122

Details

Prevent user enumeration using Guard or the new Authenticator-based Security 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](https://github.com/symfony/symfony/commit/2a581d22cc621b33d5464ed65c4bc2057f72f011) 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.

Metadata

Created: 2021-05-13T20:23:02Z
Modified: 2024-02-26T12:39:59Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/05/GHSA-5pv8-ppvj-4h68/GHSA-5pv8-ppvj-4h68.json
CWE IDs: ["CWE-200", "CWE-203"]
Alternative ID: GHSA-5pv8-ppvj-4h68
Finding: F026
Auto approve: 1