High, CVSS 7.5npmAmendedPublished
Regular Expression Denial-of-Service in npm schema-inspector
CVE-2021-21267 · GHSA-f38p-c2gq-4pmr
- Affected
- npm schema-inspector < 2.0.0
- Fixed in
- 2.0.0· Vendor fix available
- Issue
- Impact What kind of vulnerability is it? Who is impacted? 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. Patches Has the problem been patched? What versions should users upgrade to? Users should upgrade to version 2.0.0, which uses a regex expression that isn't vulnerable to ReDoS. The new regex expression is more limited in what it can check, so it is more flexible than the one used before. Therefore, this was a new major version instead of a new patch version to warn people upgrading that they should make sure the email validation still works for their…
Recommended action: Upgrade to 2.0.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.