Bug 1576275 – CVE-2018-5175 Mozilla: Universal CSP bypass on sites using strict-dynamic in their policies

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Bug 1576275 - (CVE-2018-5175) CVE-2018-5175 Mozilla: Universal CSP bypass on sites using strict-dynamic in their policies

Summary:	CVE-2018-5175 Mozilla: Universal CSP bypass on sites using strict-dynamic in ...

Status:	NEW

Aliases:	CVE-2018-5175

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

Priority	medium Severity medium
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Assigned To:	Red Hat Product Security
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URL:
Whiteboard:	impact=moderate,public=20180509,repor...
Keywords:	Security

Depends On:
Blocks:	1573375
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Reported:	2018-05-09 03:15 EDT by Doran Moppert
Modified:	2018-05-24 01:18 EDT (History)
CC List:	5 users (show)

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Description Doran Moppert 2018-05-09 03:15:53 EDT

A mechanism to bypass Content Security Policy (CSP) protections on sites that have a `script-src` policy of `'strict-dynamic'`. If a target website contains an HTML injection flaw an attacker could inject a reference to a copy of the `require.js` library that is part of Firefox’s Developer Tools, and then use a known technique using that library to bypass the CSP restrictions on executing injected scripts.



External Reference:

https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/#CVE-2018-5175

Comment 1 Doran Moppert 2018-05-09 03:15:57 EDT

Acknowledgments:

Name: the Mozilla project
Upstream: Masato Kinugawa

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