CVE-2021-21267 Regular Expression Denial-of-Service in npm schema-inspector

2021-03-1920:25:13

CWE-400

CWE-20

GitHub_M

www.cve.org

cve-2021-21267

npm

schema-inspector

denial-of-service

vulnerability

fix

regex

redos

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.007

Percentile

79.9%

JSON

Schema-Inspector is an open-source tool to sanitize and validate JS objects (npm package schema-inspector). In before version 2.0.0, email address validation is vulnerable to a denial-of-service attack where some input (for example a@0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.) will freeze the program or web browser page executing the code. This affects any current schema-inspector users using any version to validate email addresses. Users who do not do email validation, and instead do other types of validation (like string min or max length, etc), are not affected. Users should upgrade to version 2.0.0, which uses a regex expression that isn’t vulnerable to ReDoS.

CNA Affected

[
  {
    "product": "schema-inspector",
    "vendor": "schema-inspector",
    "versions": [
      {
        "status": "affected",
        "version": "< 2.0.0"
      }
    ]
  }
]