CVE-2018-12395
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Mozilla Firefox
PublishedFeb 28, 2019
First seenFeb 28, 2019
How to fix
Update
- mozilla firefox63.0 or later
- mozilla firefox_esr60.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 63.0 | 63.0 |
| mozilla firefox_esr | v < 60.3 | 60.3 |
| debian debian_linux | 8.0, 9.0 | — |
| canonical ubuntu_linux | 14.04, 16.04, 18.04, 18.10 | — |
| redhat enterprise_linux_desktop | 6.0, 7.0 | — |
| redhat enterprise_linux_server | 6.0, 7.0 | — |
| redhat enterprise_linux_server_eus | 7.5 | — |
| redhat enterprise_linux_workstation | 6.0, 7.0 | — |
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