Spoofing attack in Mozilla Firefox - CVE-2018-5138
Published: March 13, 2018
Vulnerability identifier: #VU10982
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-2018-5138
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to conduct spoofing attack.
The vulnerability exists due to an error when a malicious site with an extremely long domain name is opened in an Android Custom Tab (a browser panel inside another app) and the default browser is Firefox for Android. A remote attacker can spoof which page is actually loaded and in use.
Note: this issue only affects Firefox for Android.
Affected software
Mozilla Firefox
How to mitigate CVE-2018-5138
Update to version 59.0.