7.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2017-18214

CVE-2017-18214: Regular Expression Denial of Service in moment

Affected versions of moment are vulnerable to a low severity regular expression denial of service when parsing dates as strings.

Recommendation

Update to version 2.19.3 or later.

(GitHub Advisory)

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CVE-2017-18214

CVE-2017-18214:

7.5

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
moment	npm	< 2.19.3	2.19.3

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability CVE-2017-18214 explicitly references a ReDoS issue in the 'moment' library's date parsing logic. The GitHub commit diff shows critical modifications to the 'matchWord' regex in three files, including src/lib/parse/regex.js. The original regex used unbounded quantifiers (e.g., [0-9]* and +), which are classic indicators of ReDoS vulnerabilities. The patch introduced quantifier limits (e.g., {0,256} and {1,256}) to restrict input size. Since 'matchWord' is directly used in parsing date strings, its pre-patch form was the root cause of the vulnerability. No other functions are explicitly mentioned in the provided context, but the regex itself is the clearly identified vulnerable component.

Vulnerable functions

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WAF Protection Rules

WAF Rule

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Reasoning

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