Bug 1642185 (CVE-2018-12395) - CVE-2018-12395 Mozilla: WebExtension bypass of domain restrictions through header rewriting
Summary: CVE-2018-12395 Mozilla: WebExtension bypass of domain restrictions through he...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-12395
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1640852 1640854 1649195
Blocks: 1640850
TreeView+ depends on / blocked
 
Reported: 2018-10-23 22:07 UTC by Doran Moppert
Modified: 2021-02-26 04:49 UTC (History)
4 users (show)

Fixed In Version:
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Environment:
Last Closed: 2018-11-13 06:15:55 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3005 0 None None None 2018-10-24 22:09:38 UTC
Red Hat Product Errata RHSA-2018:3006 0 None None None 2018-10-24 22:10:10 UTC

Description Doran Moppert 2018-10-23 22:07:48 UTC 
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.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2018-27/#CVE-2018-12395
Comment 1 Doran Moppert 2018-10-23 22:07:58 UTC 
Acknowledgments:

Name: the Mozilla project
Upstream: Rob Wu, Andrew Swan
Comment 2 errata-xmlrpc 2018-10-24 22:09:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3005 https://access.redhat.com/errata/RHSA-2018:3005
Comment 3 errata-xmlrpc 2018-10-24 22:10:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

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