CVE-2021-21267
Regular Expression Denial-of-Service in npm schema-inspector
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.
- Affected
- schema-inspector
- CVSS v3.1 NVD
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS v2.0 NVD
- 5.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P - EPSS
- 2.09% chance of exploitation in the next 30 days, 81st percentile
- Published
- 2021-03-19
- Updated
- 2024-08-03
Proof-of-concept exploits (2)
- https://gist.github.com/mattwelke/b7f42424680a57b8161794ad1737cd8f
- schema-inspector/schema-inspector/security/advisories/GHSA-f38p-c2gq-4pmr
Security advisories
- https://security.netapp.com/advisory/ntap-20210528-0006
- https://www.npmjs.com/package/schema-inspector
- advisories/GHSA-f38p-c2gq-4pmr