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Content security policy issue - Closes #808 #811

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merged 3 commits into from
Sep 7, 2018
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Content security policy issue - Closes #808 #811

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ed84028
Replace unsafe-inline script for hash to avoid XSS attack
lsilvs Sep 7, 2018
d3a56bc
Extend CSP img-src to any secure source
lsilvs Sep 7, 2018
cfff5ec
Refactoring
lsilvs Sep 7, 2018
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19 changes: 12 additions & 7 deletions app.js
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Original file line number Diff line number Diff line change
Expand Up @@ -64,16 +64,21 @@ app.use((req, res, next) => {
res.setHeader('X-Frame-Options', 'DENY');
res.setHeader('X-Content-Type-Options', 'nosniff');
res.setHeader('X-XSS-Protection', '1; mode=block');
const wsSrc = `ws://${req.get('host')} wss://${req.get('host')}`;

/* eslint-disable */
res.setHeader('Content-Security-Policy',
[`frame-ancestors 'none'; default-src 'self';`,
`connect-src 'self' ${wsSrc};`,
`img-src 'self' https://*.tile.openstreetmap.org www.google-analytics.com stats.g.doubleclick.net;`,
const connectSrc = `ws://${req.get('host')} wss://${req.get('host')}`;
const contentSecurityPolicy = [
`default-src 'self';`,
`frame-ancestors 'none';`,
`connect-src 'self' ${connectSrc};`,
`img-src 'self' https:;`,
`style-src 'self' 'unsafe-inline' https://fonts.googleapis.com;`,
`script-src 'self' 'unsafe-inline' 'unsafe-eval' www.googletagmanager.com www.google-analytics.com;`,
`font-src 'self' https://fonts.gstatic.com`].join(' '));
`script-src 'self' 'sha256-L6JyfNh6FtKC6umsFxtawnD4dtWi8szFRQZU0tVgsQk=' 'unsafe-eval' www.googletagmanager.com www.google-analytics.com;`,
`font-src 'self' https://fonts.gstatic.com`,
].join(' ');
/* eslint-enable */

res.setHeader('Content-Security-Policy', contentSecurityPolicy);
return next();
});

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