Security restrictions bypass in Mozilla Firefox - CVE-2018-5142
Published: March 13, 2018
Vulnerability identifier: #VU10985
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-5142
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The vulnerability exists due to the permission notifications do not properly display the originating domain if Media Capture and Streams API permission is requested from documents with data: or blob: URLs. A remote attacker can cause the notification to state "Unknown protocol" as the requestee, leading to user confusion about which site is asking for this permission.
Affected software
Mozilla Firefox
firefox (Ubuntu package)
firefox (Ubuntu package)
How to mitigate CVE-2018-5142
Update to version 59.0.
firefox (Ubuntu package) - addressed in versions 59.0+build5-0ubuntu0.14.04.1, 59.0+build5-0ubuntu0.16.04.1, 59.0+build5-0ubuntu0.17.10.1