CVE-2021-21424
unknown
CVSS v3
—
CVSS v2
—
VIR risk
—
Description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The ability to enumerate users was possible without relevant permissions due to different handling depending on whether the user existed or not when attempting to use the switch users functionality. We now ensure that 403s are returned whether the user exists or not if a user cannot switch to a user or if the user does not exist. The patch for this issue is available for branch 3.4.
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-21424
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 4.4.19+dfsg-2 |
| debian | bullseye | fixed | 4.4.19+dfsg-2 |
| debian | forky | fixed | 4.4.19+dfsg-2 |
| debian | sid | fixed | 4.4.19+dfsg-2 |
| debian | trixie | fixed | 4.4.19+dfsg-2 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | symfony/security | >=5.0.0,<5.2.8 | 5.2.8 |
| Packagist | symfony/security-guard | >=2.8.0,<3.4.48 | 3.4.48 |
| Packagist | symfony/security-guard | >=4.0.0,<4.4.23 | 4.4.23 |
| Packagist | symfony/security-guard | >=5.0.0,<5.2.8 | 5.2.8 |
| Packagist | symfony/security-core | >=2.8.0,<3.4.48 | 3.4.48 |
| Packagist | symfony/security-core | >=4.0.0,<4.4.23 | 4.4.23 |
| Packagist | symfony/security-core | >=5.0.0,<5.2.8 | 5.2.8 |
| Packagist | lexik/jwt-authentication-bundle | >=2.0.0,<2.10.7 | 2.10.7 |
| Packagist | lexik/jwt-authentication-bundle | >=2.11.0,<2.11.3 | 2.11.3 |
| Packagist | symfony/maker-bundle | >=1.27.0,<1.29.2 | 1.29.2 |
| Packagist | symfony/maker-bundle | >=1.30.0,<1.31.1 | 1.31.1 |
| Packagist | symfony/security-http | >=5.1.0,<5.2.8 | 5.2.8 |
| Packagist | symfony/security | >=2.8.0,<3.4.49 | 3.4.49 |
| Packagist | symfony/security | >=4.0.0,<4.4.24 | 4.4.24 |
| Packagist | symfony/symfony | >=2.8.0,<3.4.49 | 3.4.49 |
| Packagist | symfony/symfony | >=4.0.0,<4.4.24 | 4.4.24 |
| Packagist | symfony/symfony | >=5.0.0,<5.2.9 | 5.2.9 |
References
- https://github.com/symfony/symfony/security/advisories/GHSA-5pv8-ppvj-4h68
- https://nvd.nist.gov/vuln/detail/CVE-2021-21424
- https://github.com/symfony/symfony/commit/2a581d22cc621b33d5464ed65c4bc2057f72f011
- https://symfony.com/cve-2021-21424
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VRUS2H2SSOQWNLBD35SKIWIDQEMV2PD3
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UC7BND775DVZDQT3RMGD2HVB2PKLJDJW
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RH7TMM5CHQYBFFGXWRPJDPB3SKCZXI2M
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KENRNLB3FYXYGDWRBH2PDBOZZKOD7VY4
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VRUS2H2SSOQWNLBD35SKIWIDQEMV2PD3
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UC7BND775DVZDQT3RMGD2HVB2PKLJDJW
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RH7TMM5CHQYBFFGXWRPJDPB3SKCZXI2M
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KENRNLB3FYXYGDWRBH2PDBOZZKOD7VY4
- https://lists.debian.org/debian-lts-announce/2023/07/msg00014.html
- https://github.com/symfony/symfony
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2021-21424.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2021-21424.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2021-21424.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-guard/CVE-2021-21424.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/maker-bundle/CVE-2021-21424.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/lexik/jwt-authentication-bundle/CVE-2021-21424.yaml
- https://security-tracker.debian.org/tracker/CVE-2021-21424
Verify integrity in audit chain (admin only). AS-IS.