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MFSA2017-21 Firefox: Security vulnerabilities fixed in Firefox 56 (CVE-2017-7823)

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MFSA2017-21 Firefox: Security vulnerabilities fixed in Firefox 56 (CVE-2017-7823)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
06/11/2018
Created
07/25/2018
Added
07/12/2018
Modified
08/13/2018

Description

The content security policy (CSP) "sandbox" directive did not create a unique origin for the document, causing it to behave as if the "allow-same-origin" keyword were always specified. This could allow a Cross-Site Scripting (XSS) attack to be launched from unsafe content. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

Solution(s)

  • mozilla-firefox-upgrade-56_0

References

  • mozilla-firefox-upgrade-56_0

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