Is This vulnerability exploited in the wild?

No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

How severe is This vulnerability?

Informational severity, published 31 July 2018.

Which products and versions are affected?

moment (npm) SEMVER:introduced=0,fixed=2.11.2.

Is there a fix for This vulnerability?

Yes. moment (npm): upgrade to 2.11.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is This vulnerability attacked?

It is attacked over the network.

Check whether you run moment (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Moment.js regular expression denial of service in duration function

Severity: info · Published 2018-07-31

Moment.js is a popular JavaScript library for parsing, validating, and formatting dates and times. A vulnerability in the duration function allows an attacker to submit a specially crafted long string that causes excessive CPU consumption, potentially leading to service unavailability or denial of service conditions for applications relying on this library.

Technologies: moment (npm). Vendors: npm.

Quick answers

Is This vulnerability exploited in the wild?: No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
How severe is This vulnerability?: Informational severity, published 31 July 2018.
Which products and versions are affected?: moment (npm) SEMVER:introduced=0,fixed=2.11.2.
Is there a fix for This vulnerability?: Yes. moment (npm): upgrade to 2.11.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is This vulnerability attacked?: It is attacked over the network.
Am I affected?: Check whether you run moment (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

moment (npm): upgrade to 2.11.2 or later
```
npm install moment@2.11.2
```

Technical details

This vulnerability is a Regular Expression Denial of Service (ReDoS) flaw in the duration function of moment.js. The vulnerable component uses a regex pattern that exhibits exponential backtracking behavior when processing certain input strings, allowing an attacker to craft long strings that trigger excessive CPU consumption. The attack vector is network-based and requires no authentication—any application accepting untrusted input and passing it to the duration function is at risk. The vulnerability affects versions before 2.11.2, which includes a fix for the problematic regex pattern. This advisory was withdrawn as an accidental duplicate of CVE-2016-4055.

Affected products

Moment.js Moment before 2.11.2

Timeline

2018-07-31: disclosed: Advisory published to GitHub Advisory Database
2011-02-01: patched: Fixed in version 2.11.2
2020-06-17: other: Advisory withdrawn as accidental duplicate of CVE-2016-4055

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