PT-2022-8728 · Is.Js · Is.Js

Erik Krogh Kristensen · Published 2022-12-22 · Updated 2023-07-06 · CVE-2020-26302

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions is.js versions 0.9.0 and prior

Description is.js is a general-purpose check library that contains one or more regular expressions vulnerable to Regular Expression Denial of Service (ReDoS). The library uses a regex to validate URLs, which can cause it to loop "forever" when trying to validate a malicious string. This issue was identified using a CodeQL query that detects inefficient regular expressions.

Recommendations For versions 0.9.0 and prior, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Resource Exhaustion

DoS

Weakness Enumeration

CWE-400

CWE-1333

Related Identifiers

CVE-2020-26302

GHSA-PVRW-G6FX-MCX2

Affected Products

Is.Js

References · 7

• 🔥 https://securitylab.github.com/advisories/GHSL-2020-295-redos-is.js · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-26302 · Security Note
• https://osv.dev/vulnerability/CVE-2020-26302 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-pvrw-g6fx-mcx2 · Vendor Advisory
• https://github.com/arasatasaygin/is.js/issues/320 · Note
• https://github.com/arasatasaygin/is.js · Note
• https://t.me/cibsecurity/55201 · Telegram Post