medium
6.1
CWE
79
Advisory Published
CVE Published
Updated

CVE-2018-5175: XSS

First published: Wed May 09 2018(Updated: )

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. This vulnerability affects Firefox < 60.

Credit: security@mozilla.org security@mozilla.org

Affected SoftwareAffected VersionHow to fix
Mozilla Firefox<60
60
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=17.10
Canonical Ubuntu Linux=18.04
Mozilla Firefox<60.0
debian/firefox
131.0.2-2

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2018-5175?

    CVE-2018-5175 is a vulnerability that allows bypassing Content Security Policy (CSP) protections on websites with a 'strict-dynamic' policy.

  • Which software is affected by CVE-2018-5175?

    Mozilla Firefox versions up to 60.0, Ubuntu with Firefox versions up to 60.0, and various versions of Canonical Ubuntu Linux are affected by CVE-2018-5175.

  • What is the severity rating of CVE-2018-5175?

    The severity rating of CVE-2018-5175 is medium with a CVSS score of 6.1.

  • How can I fix CVE-2018-5175?

    To fix CVE-2018-5175, update your Mozilla Firefox browser to version 60.0 or higher, or update Ubuntu or Canonical Ubuntu Linux to versions that include Firefox 60.0 or higher.

  • Where can I find more information about CVE-2018-5175?

    You can find more information about CVE-2018-5175 at the following references: <ul><li>https://bugzilla.mozilla.org/show_bug.cgi?id=1432358</li><li>https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/</li><li>http://www.securityfocus.com/bid/104139</li></ul>

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