#VU9321 CSP policy bypass in Mozilla Firefox - CVE-2017-7834

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Main Vulnerability Database Vulnerabilities #VU9321

#VU9321 CSP policy bypass in Mozilla Firefox - CVE-2017-7834

Published: November 15, 2017


Vulnerability identifier: #VU9321
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-7834
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Mozilla Firefox
Software vendor:
Mozilla

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

A data: URL loaded in a new tab did not inherit the Content Security Policy (CSP) of the original page, allowing for bypasses of the policy including the execution of JavaScript. In prior versions when data: documents also inherited the context of the original page this would allow for potential cross-site scripting (XSS) attacks.


Remediation

Update to version Firefox 57.

External links