Liran Tal
💚@nodejs Security WG member | Core team @meanjs, #dockly | Author: 📘Essential Node.js Security ✨ Engineering Manager @nielsen-oss | ❤️#opensource #javascript
Black Clouds & Silver Linings
in Node.js Security
Liran Tal
Developer Advocate @ Snyk
@liran_tal
github.com/lirantal
2020
@liran_tal
github.com/lirantal
Liran Tal
Developer Advocate
01
Black Clouds in Node.js Security
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Common Security Vulnerabilities
Silver Linings in Node.js Security
Black Clouds & Silver Linings
in Node.js Security
@liran_tal
@liran_tal
"Installing an average npm package introduces an implicit trust on 79 third-party packages and 39 maintainers, creating a surprisingly large attack surface"
- Zimmerman et. al.
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npm's Heavy reuse
Spring web framework
10 transitive dependencies
Express web framework
47 transitive dependencies
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src: https://snyk.io/opensourcesecurity-2019
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The Biggest Repository
Invites big risks
Lucrative attack playground
Open and free-to-publish ecosystem
Difficult to counter-measure
- Disconnect between SCM and Registry
- Commiter !== Publisher
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Small World with High Risks:
A Study of Security Threats in the npm Ecosystem
src: www.usenix.org/conference/usenixsecurity19/presentation/zimmerman
2019
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"a small, linear increase in direct dependencies leads to a significant, super-linear increase in transitive dependencies"
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"transitive dependencies of an average package has increased to a staggering 80 in 2018"
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"for the majority of the time the reach of vulnerable unpatched code is between 30% and 40% is alarming"
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Typosquatting Attacks
Compromised Accounts
Social Engineering
Malicious Modules
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Malicious Modules
time
Jan 2017
crossenv
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$ npm install crossenv --savecrossenv != cross-env
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crossenv/package.json
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crossenv/package-setup.js
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coffescript or coffe-script
coffeescript
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src: https://snyk.io/vuln
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How did we find out about this malicious crossenv package?
post-install script ✅
call-home base64 payload ✅
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Malicious Modules
time
Jan 2017
crossenv
May 2018
getcookies
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getcookies
parse http headers for cookie data
or does it... ?
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getcookies
http-fetch-cookies
└── express-cookies
└── getcookies
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getcookies
mailparser
└── http-fetch-cookies
└── express-cookies
└──getcookies
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@liran_tal
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Reset the buffer
Load JavaScript code
Execute code
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Observation 1
security by code review has to be on-point ALL THE TIME, where-as attackers only have to get lucky ONCE
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Malicious Modules
time
Jan 2017
crossenv
May 2018
getcookies
Jul 2018
eslint-scope
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eslint-scope 3.7.2
malicious package published
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What's going on?
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Who depends on eslint-scope?
babel-eslint
eslint
webpack
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npm invalidates all tokens
<= 2018-07-12
estimated potential ~4,500 accounts were compromised
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Observation 2
eslint-scope published an npm package, but actors had no github repository access so the source code varied between github and the published npm package
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How does something like this happen?
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Compromised Contributors ?
14%
compromised npm modules
Compromised Contributors ?
src: https://github.com/ChALkeR/notes
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Compromised Contributors ?
20%
npm total monthly downloads
express
react
debug
moment
request
Compromised Contributors ?
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Compromised Contributors ?
koa
maintainers
password
had their password set to
Compromised Contributors ?
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Compromised Contributors ?
1409
users
had their password set to
their username
Compromised Contributors ?
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Compromised Contributors ?
11%
users
had their password set to
previously leaked password
Compromised Contributors ?
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61% of packages on npm
could be considered
abandoned
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Malicious Modules
time
Jan 2017
crossenv
May 2018
getcookies
Jul 2018
eslint-scope
event-stream
Nov 2018
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src: https://snyk.io/blog/a-post-mortem-of-the-malicious-event-stream-backdoor
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some popular packages reach more than 100,000 other packages via
direct or transitive depenencies
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event-stream reached 5,466 packages when it was compromised and it's not even considered "top" influence
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Observation 3
due to the increased use of transpilers, reviewing and comparing source code between actual source to distributed is a real problem
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Dependency Management
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(CC BY-NC-SA 2.0)
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Rolling out security fixes
The security blindspot of
lockfile attack vectors
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src: https://npmjs.com/package/lockfile-lint
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Common Security
Vulnerabilities
Code Injection
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The npmjs Ecosystem
Silver Linings in
Node.js Security
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2FA Enabled accounts
since npm >= 5.5.1
6.89%
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Enable 2FA
since npm >= 5.5.1
$ npm profile enable-2fa
2FA successfully enabled.
Below are your recovery codes,
please print these out.
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- auto release ?
- tokens are global for all packages
👉 https://github.com/nodejs/package-maintenance/issues/244
Enable 2FA
caveats 😞
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Find vulnerabilities in
open source dependencies
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What if security was easier?
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"a sign of a healthy security community that reports vulnerabilities at a very good pace, keeping up with the growth of the ecosystem"
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The Security WG
@liran_tal
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Developer's security awareness
Fix vulnerabilities in our open source deps
Join the Node.js Security WG 🤗
Black Clouds & Silver Linings
in Node.js Security
@liran_tal
@liran_tal
github.com/lirantal
Liran Tal
Developer Advocate
Use Open Source, Stay Secure.
Thank you
Black Clouds & Silver Linings in Node.js Security - NodeTLV 2020
By Liran Tal
Black Clouds & Silver Linings in Node.js Security - NodeTLV 2020
With a great ecosystem, comes great responsibility, and application security is not one to wave off. Let’s review some black clouds of security horror stories in the Node.js ecosystem, and learn how to mitigate them to build secure JavaScript and Node.js applications. We will deep-dive into practical Node.js security measures which you can easily implement in your current projects, covering OWASP Top 10 issues such as injection attacks and secure dependencies management. Finally, we will review the work and initiatives that the Node.js Security Working Group have been taking to ensure a more secure future for Node.js.
