CVE-2017-7770

MEDIUM

Firefox < 54.0 - Address Bar Spoofing via Fullscreen Mode

Title source: llm

Description

A mechanism where when a new tab is loaded through JavaScript events, if fullscreen mode is then entered, the addressbar will not be rendered. This would allow a malicious site to displayed a spoofed addressbar, showing the location of an arbitrary website instead of the one loaded. Note: this issue only affects Firefox for Android. Desktop Firefox is unaffected. This vulnerability affects Firefox < 54.

References (4)

Core 4

Core References

Issue Tracking, Vendor Advisory x_refsource_confirm

https://bugzilla.mozilla.org/show_bug.cgi?id=1317242

Vendor Advisory x_refsource_confirm

https://www.mozilla.org/security/advisories/mfsa2017-15/

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

http://www.securitytracker.com/id/1038689

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/99049

Scores

CVSS v3 5.9

EPSS 0.0037

EPSS Percentile 58.9%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Details

CWE

CWE-20

Status published

Products (1)

mozilla/firefox < 54.0

Published Jun 11, 2018

Tracked Since Feb 18, 2026