CVE-2021-31406 Timing side channel vulnerability in endpoint request handler in Vaadin 15-19

2021-04-2316:05:41

CWE-208

Vaadin

www.cve.org

cve-2021-31406

vaadin 15-19

csrf tokens

fusion endpoints

timing attack

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

4.6

Confidence

High

EPSS

Percentile

12.6%

JSON

Non-constant-time comparison of CSRF tokens in endpoint request handler in com.vaadin:flow-server versions 3.0.0 through 5.0.3 (Vaadin 15.0.0 through 18.0.6), and com.vaadin:fusion-endpoint version 6.0.0 (Vaadin 19.0.0) allows attacker to guess a security token for Fusion endpoints via timing attack.

CNA Affected

[
  {
    "product": "Vaadin",
    "vendor": "Vaadin",
    "versions": [
      {
        "status": "affected",
        "version": "19.0.0"
      },
      {
        "lessThan": "*",
        "status": "affected",
        "version": "15.0.0",
        "versionType": "custom"
      }
    ]
  },
  {
    "product": "flow-server",
    "vendor": "Vaadin",
    "versions": [
      {
        "status": "affected",
        "version": "6.0.0"
      },
      {
        "lessThan": "*",
        "status": "affected",
        "version": "3.0.0",
        "versionType": "custom"
      }
    ]
  }
]