Spoofing attack in Google Chrome - CVE-2021-21212

Vulnerability identifier: #VU52242

CSH Severity: Medium

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-21212

CWE-ID: CWE-451

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to insufficient validation of user-supplied input in Network Config UI in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into visiting it and spoof web page content.

Google Chrome
Microsoft Edge
Gentoo Linux
Fedora
chromium (Debian package)
chromium

Update to version 90.0.4430.72.

Google Chrome - addressed in versions 90.0.4430.72, 91.0.4472.77
chromium (Debian package) - update to 90.0.4430.85-1~deb10u1
Microsoft Edge - update to 90.0.818.39
chromium - addressed in versions 90.0.4430.93-1.el7, 90.0.4430.93-1.el8, 90.0.4430.93-1.fc32, 90.0.4430.93-1.fc33, 90.0.4430.93-1.fc34

• https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_14.html
• https://crbug.com/1145024

• Multiple vulnerabilities in Google Chrome
• Multiple vulnerabilities in Microsoft Edge (Chromium-based)
• Debian update for chromium
• Gentoo update for Chromium, Google Chrome
• Multiple vulnerabilities in Google Chrome
• Fedora 34 update for chromium
• Fedora 32 update for chromium
• Fedora 33 update for chromium
• Fedora EPEL 8 update for chromium
• Fedora EPEL 7 update for chromium