Wed Dec 12 2018 21:24:00 GMT+0100 (CET)
Now there is another example of an npm package that contains malicious code, and it happened exactly how you would have predicted. A social attack to get publishing access, not to a popular package, but to a package that a popular package depends on.
The hack was pretty genius and not a script kiddie like, as it code was encrypted and could only be decrypted by the package “bitpay/copay” module description. Not something you would immediately discover.
I was at Node.js Interactive in 2016 and did ask a few people as Node.js got more a more popular it would also become a bigger and bigger target for hackers as more and more people install packages that could contain malicious code. The response was there was not much to do and we must wait and see, and it is also easy to go around cry wolf at everybody.
So what could be the solutions? I have multiples that could work by itself or mixed together.
Run everything in containers
You can limit everything from disk access, network activity both during installation and runtime. Even in production with new solutions like Istio you will be able to control exactly what a container is allowed to do like disk access and outgoing traffic on per-container-level.
Don’t install anything that is less than 7/14/X days old
If you don’t install something that is very new, you can depend on others and automated systems to scan and find new vulnerabilities.
Sign all packages published with a private key
After a package has been built, the tar ball, a private key is used to sign the package and generating a signature. Then everyone can verify with the signature if the package has been manipulated or if somebody tries to impersonate a author.
We do have integrity checks right now in
package-lock.json, but that is only a check that it generates when you download the package the first time so that you can check it against next time you download it on another machine.
Complain if the package you dependent on have changed signing key
This would have caught the attach mentioned at the top, the new author or more really, the hacker, would not have had @dominictarr publishing key and the publishing streak of him would have been broken.
http://node-modules.com/ is a super cool npm search engine which if you log in with your github account, factors in which github users you follow into the ranking so that authors you follow on github comes up much higher than unknown authors.
Only install packages that have been signed by 2/3/X other people
Publishing doesn’t need to be centralized like many publishing platforms are that seeks to keep users safe like the App Store. Centralization allows reviews, but it also keeps one company in power. If npm suddenly decided that all packages have to be reviewed by their team, it would be pretty terrible from a authors perspective but you would not have any other choice really as npm is the defacto package hosting.
So a solution would be to crowdsource reviews, and host them in a decentralized way, a decentralized platform like Ethereum would allow anybody to sign packages that they have reviewed and you could select which people or groups you trust and only download packages or really code that they have signed.
Tell me what you think! Would love to hear your thoughts on this! https://twitter.com/kevinsimper
Link to blogpost about the hack:
Originally published at www.kevinsimper.dk.