Spoofing attack in Mozilla Firefox - CVE-2020-6808

Vulnerability identifier: #VU25852

CSH Severity: Low

CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-6808

CWE-ID: CWE-451

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data. A remote attacker can create a specially crafted web page and spoof web page URL via a javascript: URL.

Mozilla Firefox
Arch Linux
firefox (Ubuntu package)
firefox (Alpine package)
Cloud App Management V2018

Install updates from vendor's website.

Mozilla Firefox - update to 74.0
firefox (Ubuntu package) - addressed in versions 74.0+build3-0ubuntu0.16.04.1, 74.0+build3-0ubuntu0.18.04.1, 74.0+build3-0ubuntu0.19.10.1
firefox (Alpine package) - update to 74.0-r0
Cloud App Management V2018 - update to 2020.1.0

• https://www.mozilla.org/en-US/security/advisories/mfsa2020-08/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1247968

• Multiple vulnerabilities in Mozilla Firefox and Firefox ESR
• Arch Linux update for firefox
• Ubuntu update for Firefox
• Spoofing attack in firefox (Alpine package)
• Multiple vulnerabilities in IBM Cloud App Management