Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1wdnJ3LWc2ZngtbWN4Ms4AA0Tj

is_js vulnerable to Regular Expression Denial of Service

is.js is a general-purpose check library. Versions 0.9.0 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). is.js uses a regex copy-pasted from a gist to validate URLs. Trying to validate a malicious string can cause the regex to loop "forever." This vulnerability was found using a CodeQL query which identifies inefficient regular expressions. is.js has no patch for this issue.

Permalink: https://github.com/advisories/GHSA-pvrw-g6fx-mcx2
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1wdnJ3LWc2ZngtbWN4Ms4AA0Tj
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: 3 months ago
Updated: 3 months ago

CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Identifiers: GHSA-pvrw-g6fx-mcx2, CVE-2020-26302
References:

• https://nvd.nist.gov/vuln/detail/CVE-2020-26302
• https://github.com/arasatasaygin/is.js/issues/320
• https://securitylab.github.com/advisories/GHSL-2020-295-redos-is.js
• https://github.com/advisories/GHSA-pvrw-g6fx-mcx2

Affected Packages