CVE-2020-5275
Description
In symfony/security-http before versions 4.4.7 and 5.0.7, when a `Firewall` checks access control rule, it iterate overs each rule's attributes and stops as soon as the accessDecisionManager decides to grant access on the attribute, preventing the check of next attributes that should have been take into account in an unanimous strategy. The accessDecisionManager is now called with all attributes at once, allowing the unanimous strategy being applied on each attribute. This issue is patched in versions 4.4.7 and 5.0.7.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 4.4.8-1 |
| sid | Fixed | 4.4.8-1 |
| forky | Fixed | 4.4.8-1 |
| bullseye | Fixed | 4.4.8-1 |
| bookworm | Fixed | 4.4.8-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | symfony/security | >=4.4.0,<4.4.7 | 4.4.7 |
| Packagist | symfony/security | >=5.0.0,<5.0.7 | 5.0.7 |
| Packagist | symfony/security-http | >=4.4.0,<4.4.7 | 4.4.7 |
| Packagist | symfony/security-http | >=5.0.0,<5.0.7 | 5.0.7 |
| Packagist | symfony/symfony | >=4.4.0,<4.4.7 | 4.4.7 |
| Packagist | symfony/symfony | >=5.0.0,<5.0.7 | 5.0.7 |
References
- https://github.com/symfony/symfony/security/advisories/GHSA-g4m9-5hpf-hx72
- https://nvd.nist.gov/vuln/detail/CVE-2020-5275
- https://github.com/symfony/symfony/commit/c935e4a3fba6cc2ab463a6ca382858068d63cebf
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2020-5275.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2020-5275.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-5275.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ
- https://symfony.com/cve-2020-5275
- https://security-tracker.debian.org/tracker/CVE-2020-5275
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.