CVE-2018-12395
high-risk
Published 2019-02-28
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.
Do I need to act?
~
2.9% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (15)
References (22)
Third Party Advisory
http://www.securityfocus.com/bid/105718
Third Party Advisory
http://www.securitytracker.com/id/1041944
Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3005
Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3006
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1467523
Third Party Advisory
https://security.gentoo.org/glsa/201811-04
Third Party Advisory
https://usn.ubuntu.com/3801-1/
Third Party Advisory
https://www.debian.org/security/2018/dsa-4324
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-26/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-27/
Third Party Advisory
http://www.securityfocus.com/bid/105718
Third Party Advisory
http://www.securitytracker.com/id/1041944
Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3005
Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3006
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1467523
Third Party Advisory
https://security.gentoo.org/glsa/201811-04
Third Party Advisory
https://usn.ubuntu.com/3801-1/
Third Party Advisory
https://www.debian.org/security/2018/dsa-4324
and 2 more references
50
/ 100
high-risk
Severity
26/34 · High
Exploitability
6/34 · Minimal
Exposure
18/34 · Moderate