Vulnerability CVE-2018-12395
Published: 2019-02-28

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.

Type:

CWE-noinfo

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Redhat -> Enterprise linux desktop 
Redhat -> Enterprise linux server 
Redhat -> Enterprise linux server eus 
Redhat -> Enterprise linux workstation 
Mozilla -> Firefox 
Mozilla -> Firefox esr 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 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/
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