Regular Expression Denial-of-Service in npm schema-inspector
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 use case.
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading?
If a user chooses to not upgrade, the only known workaround would be to stop using the email validation feature in the library. The user could, for example, accept the email address into their system but save it in a "not yet validated" state in their system until a verification email is sent to it (to determine whether the email is valid and belongs to the form submitter). Note that this is the preferred way of validating email addresses anyways.
Validation Bypass in schema-inspector
In schema-inspector before 1.6.9, a maliciously crafted JavaScript object can bypass the sanitize() and the validate() function used within schema-inspector.
To fix a security vulnerability (CVE-2021-21267) in the 1.x.x email Regex expression used, a new Regex expression was used which may be less flexible than the expression used in 1.x.x. Therefore, version 2.0.0 was released with this new expression. It's highly-recommended to upgrade to this new version after testing it.
If you need the old, insecure behavior, use version 1.x.x or use the custom validation function feature for your field and perform email address validation any way you like.
v1.7.0
Adds support for v4 UUID strings (ex. a4c46b74-cf00-4cd0-9100-e121ce4b67de) using regex. See README for usage example. See Atinux/schema-inspector#79 (PR by @ViniciusFXavier )
v1.6.10
fix #77: change version of async dep to ~2.6.3 for IE compatibility (PR #80 by @mattwelke)
This version was pushed to npm by mattwelke, a new releaser for schema-inspector since your current version.
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Bumps schema-inspector from 1.6.8 to 2.0.0. This update includes security fixes.
Vulnerabilities fixed
Sourced from The GitHub Security Advisory Database.
Sourced from The GitHub Security Advisory Database.
Release notes
Sourced from schema-inspector's releases.
Commits
e02ea1fupdate readme regarding 2.0.049fa4b7Fix email regex security vulnerability (GHSL-2020-358) by replacing regex (#92)8e0610dMerge pull request #89 from schema-inspector/dependabot/npm_and_yarn/mocha-8.3.0005a9b3Bump mocha from 7.0.0 to 8.3.0e88803bMerge pull request #87 from ViniciusFXavier/patch-126df7bbUpdate README.mdca5a7a9Create dependabot.yml8b8fea0Create codeql-analysis.yml (#84)d4e782cReplace link to vendored jquery file in frontEndTest.html with latest… (#81)a6b8de41.7.0Maintainer changes
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