Main Vulnerability Database Vulnerabilities #VU9328

#VU9328 Referrer policy bypass in Mozilla Firefox - CVE-2017-7842

Published: November 15, 2017

Vulnerability identifier: #VU9328

Vulnerability risk: Low

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2017-7842

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.

If a document’s Referrer Policy attribute is set to "no-referrer" sometimes two network requests are made for <link> elements instead of one. One of these requests includes the referrer instead of respecting the set policy to not include a referrer on requests.

Remediation

Update to version Firefox 57.

External links

https://www.mozilla.org/en-US/security/advisories/mfsa2017-24/