CVE-2018-12395

MEDIUM

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.

References

http://www.securityfocus.com/bid/105718

http://www.securitytracker.com/id/1041944

https://access.redhat.com/errata/RHSA-2018:3005

https://access.redhat.com/errata/RHSA-2018:3006

https://bugzilla.mozilla.org/show_bug.cgi?id=1467523

https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html

https://security.gentoo.org/glsa/201811-04

https://usn.ubuntu.com/3801-1/

https://www.debian.org/security/2018/dsa-4324

https://www.mozilla.org/security/advisories/mfsa2018-26/

https://www.mozilla.org/security/advisories/mfsa2018-27/

Details

Source: MITRE

Published: 2019-02-28

Updated: 2019-10-03

Risk Information

CVSS v2.0

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH