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CVE-2020-5275

Firewall configured with unanimous strategy was not actually unanimous in symfony/security-http

HIGH
8.1
CVSS Score
Published: March 30, 2020 at 07:45 PM UTC
Updated: June 17, 2026 at 03:21 AM UTC
2 products affected across 2 vendorsSymfonySymfony

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Severity
HIGH8.1
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Symfony· Sensiolabsdrupal
95%
4.4.0 ≤ v < 4.4.75.0.0 ≤ v < 5.0.7
Affected range stops below 4.4.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.0.7, so it looks safe — our inference, not a vendor statement
Symfony· Symfonycomposer
60%
v < 4.4.7v < 5.0.7
Affected range stops below 4.4.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.0.7, so it looks safe — our inference, not a vendor statement

References (3)

x_refsource_CONFIRMPatchThird Party Advisory
Source: [email protected]
https://github.com/symfony/symfony/commit/c935e4a3fba6cc2ab463a6ca382858068d63cebf
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/symfony/symfony/security/advisories/GHSA-g4m9-5hpf-hx72
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C36JLPHUPKDFAX6D5WYFC4ALO2K7RDUQ/

CVSS

8.1HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-285CWE-863

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