#VU58549 Integer underflow in Google Chromium - CVE-2021-4066

Vulnerability identifier: #VU58549

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-4066

CWE-ID: CWE-191

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Google Chromium
Client/Desktop applications / Web browsers

Vendor: Google

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to integer underflow. A remote attacker can send a specially crafted request to the affected application, trigger integer underflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Update to version 96.0.4664.93.

Vulnerable software versions

Google Chromium: 96.0.4664.0 - 96.0.4664.92

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External links
https://chromereleases.googleblog.com/2021/12/stable-channel-update-for-desktop.html
https://crbug.com/1274499
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-4066

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.