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CVE-2018-12395 Affecting firefox package, versions <63.0+build2-0ubuntu0.16.04.2

Severity

 Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.74% (82nd percentile)

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  • Snyk IDSNYK-UBUNTU1604-FIREFOX-422861
  • published28 Oct 2018
  • disclosed28 Feb 2019
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Introduced: 28 Oct 2018

CVE-2018-12395  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 firefox to version 63.0+build2-0ubuntu0.16.04.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

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.