Bug 1642185 – CVE-2018-12395 Mozilla: WebExtension bypass of domain restrictions through header rewriting

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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...

Status:	NEW

Aliases:	CVE-2018-12395

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	impact=moderate,public=20181023,repor...
Keywords:	Security

Depends On:	1640852 1640854
Blocks:	1640850
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Reported:	2018-10-23 18:07 EDT by Doran Moppert
Modified:	2018-10-24 18:10 EDT (History)
CC List:	4 users (show)

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:3005	None	None	None	2018-10-24 18:09 EDT
Red Hat Product Errata	RHSA-2018:3006	None	None	None	2018-10-24 18:10 EDT

Groups: None (edit)

Description Doran Moppert 2018-10-23 18:07:48 EDT

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 18:07:58 EDT

Acknowledgments:

Name: the Mozilla project
Upstream: Rob Wu, Andrew Swan

Comment 2 errata-xmlrpc 2018-10-24 18:09:34 EDT

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 18:10:05 EDT

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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