Auth bypass in Sensiolabs Symfony
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 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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.011 (65.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Sensiolabs Symfony
- Symfony — versions >= 4.4.0, < 4.4.7, >= 5.0.0, < 5.0.7
Weakness classification (CWE)
References
- github.com/symfony/symfony/security/advisories/GHSA-g4m9-5hpf-hx72 (Third Party Advisory)
- github.com/symfony/symfony/commit/c935e4a3fba6cc2ab463a6ca382858068d63cebf (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2020-5275?
- CVE-2020-5275 is a high-severity vulnerability in Sensiolabs Symfony, classified under Improper Authorization. CVSS score: 7.6/10. Published 2020-03-30.
- How severe is CVE-2020-5275?
- High severity. CVSS v3 base score is 7.6 out of 10.