Cross-site scripting in Mozilla Firefox - CVE-2017-7823

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Main Vulnerability Database Vulnerabilities #VU8629

Cross-site scripting in Mozilla Firefox - CVE-2017-7823

Published: September 28, 2017 / Updated: September 29, 2017


Vulnerability identifier: #VU8629
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2017-7823
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform XSS attacks.

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.

Affected software

Mozilla Firefox
Firefox ESR
Gentoo Linux
Arch Linux
Debian Linux
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
SUSE Linux
Ubuntu
Mozilla Thunderbird

How to mitigate CVE-2017-7823

Update to version 56.0.


External References

Related Security Bulletins