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Server session is not invalidated when logout() helper method of Authentication module is used in Vaadin 18-19

Moderate severity GitHub Reviewed Published Apr 20, 2021 in vaadin/flow • Updated Apr 17, 2023

Package

maven com.vaadin:flow-client (Maven)

Affected versions

>= 5.0.0, < 6.0.5

Patched versions

6.0.5

Description

Authentication.logout() helper in com.vaadin:flow-client versions 5.0.0 prior to 6.0.0 (Vaadin 18), and 6.0.0 through 6.0.4 (Vaadin 19.0.0 through 19.0.3) uses incorrect HTTP method, which, in combination with Spring Security CSRF protection, allows local attackers to access Fusion endpoints after the user attempted to log out.

References

@fluorumlabs fluorumlabs published to vaadin/flow Apr 20, 2021
Reviewed Apr 22, 2021
Published to the GitHub Advisory Database Apr 22, 2021
Last updated Apr 17, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-6hgr-2g6q-3rmc

Source code

Credits

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