GitHub Advisoryadvisory · Packagist
GHSA-g4m9-5hpf-hx72 Firewall configured with unanimous strategy was not actually unanimous in Symfony
HIGH
Official page ↗
- Aliases
- CVE-2020-5275
- Ecosystem
- Packagist
- Packages
- symfony/security, symfony/security-http, symfony/symfony
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
- Weaknesses
- CWE-285
- Reviewed
- 2020-03-30
Affected packages
• Packagist symfony/security: >= 4.4.0, < 4.4.7 → fixed in 4.4.7
• Packagist symfony/security: >= 5.0.0, < 5.0.7 → fixed in 5.0.7
• Packagist symfony/security-http: >= 4.4.0, < 4.4.7 → fixed in 4.4.7
• Packagist symfony/security-http: >= 5.0.0, < 5.0.7 → fixed in 5.0.7
• Packagist symfony/symfony: >= 4.4.0, < 4.4.7 → fixed in 4.4.7
• Packagist symfony/symfony: >= 5.0.0, < 5.0.7 → fixed in 5.0.7
Description
Description
-----------
On Symfony before 4.4.0, when a `Firewall` checks an access control rule (using the unanimous strategy), it iterates over all rule attributes and grant access only if *all* calls to the `accessDecisionManager` decide to grant access.
As of Symfony 4.4.0, a bug was introduced that prevents the check of attributes as soon as `accessDecisionManager` decide to grant access on one attribute.
Resolution
----------
The `accessDecisionManager` is now called with all attributes at once, allowing the unanimous strategy being applied on each attribute.
The patch for this issue is available here for the 4.4 branch.
Credits
-------
I would like to thank Antonio J. García Lagar for reporting & Robin Chalas for fixing the issue.
Related
Alias · CVE (1)
- CVE-2020-5275 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… vulnerability
Weakness · CWE (1)
- CWE-285 Improper Authorization weakness
References
- https://github.com/symfony/symfony/security/advisories/GHSA-g4m9-5hpf-hx72 web
- https://nvd.nist.gov/vuln/detail/CVE-2020-5275 advisory
- https://github.com/symfony/symfony/commit/c935e4a3fba6cc2ab463a6ca382858068d63cebf web
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2020-5275.yaml web
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2020-5275.yaml web
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2020-5275.yaml web
- https://lists.fedoraproject.org/archives/list/[email protected]/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ web
- https://symfony.com/cve-2020-5275 web