CVE-2021-31404 Information

Description

Non-constant-time comparison of CSRF tokens in UIDL request handler in com.vaadin:flow-server versions 1.0.0 through 1.0.13 (Vaadin 10.0.0 through 10.0.16) 1.1.0 prior to 2.0.0 (Vaadin 11 prior to 14) 2.0.0 through 2.4.6 (Vaadin 14.0.0 through 14.4.6) 3.0.0 prior to 5.0.0 (Vaadin 15 prior to 18) and 5.0.0 through 5.0.2 (Vaadin 18.0.0 through 18.0.5) allows attacker to guess a security token via timing attack.

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Reference

https://vaadin.com/security/cve-2021-31404 https://github.com/vaadin/flow/pull/9875

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

2.5