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CVE-2018-12395 By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through…
Description
By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting. This would allow access to domains that share a host that are otherwise restricted. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox ESR 60.3 | earliest → < 60.3 | 60.3 |
| Firefox 63 | earliest → < 63 | 63 |
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