GitHub Advisoryadvisory · npm

GHSA-6chw-6frg-f759 Regular Expression Denial of Service in Acorn

HIGH Published 2020-04-03 Modified 2021-08-23 Official page ↗
Ecosystem
npm
Packages
acorn
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-400
Reviewed
2020-04-03

Affected packages

• npm acorn: >= 5.5.0, < 5.7.4 → fixed in 5.7.4 • npm acorn: >= 6.0.0, < 6.4.1 → fixed in 6.4.1 • npm acorn: >= 7.0.0, < 7.1.1 → fixed in 7.1.1

Description

Affected versions of acorn are vulnerable to Regular Expression Denial of Service. A regex in the form of /[x-\ud800]/u causes the parser to enter an infinite loop. The string is not valid UTF16 which usually results in it being sanitized before reaching the parser. If an application processes untrusted input and passes it directly to acorn, attackers may leverage the vulnerability leading to Denial of Service.

Related

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References