CVE-2020-5397 CSRF Attack via CORS Preflight Requests with Spring MVC or Spring WebFlux

2020-01-1718:50:12

CWE-352

pivotal

www.cve.org

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

AI Score

7.2

Confidence

High

EPSS

0.001

Percentile

50.0%

JSON

Spring Framework, versions 5.2.x prior to 5.2.3 are vulnerable to CSRF attacks through CORS preflight requests that target Spring MVC (spring-webmvc module) or Spring WebFlux (spring-webflux module) endpoints. Only non-authenticated endpoints are vulnerable because preflight requests should not include credentials and therefore requests should fail authentication. However a notable exception to this are Chrome based browsers when using client certificates for authentication since Chrome sends TLS client certificates in CORS preflight requests in violation of spec requirements. No HTTP body can be sent or received as a result of this attack.

CNA Affected

[
  {
    "product": "Spring Framework",
    "vendor": "Spring",
    "versions": [
      {
        "lessThan": "v5.2.3.RELEASE",
        "status": "affected",
        "version": "5.2",
        "versionType": "custom"
      }
    ]
  }
]