#VU52059 Integer overflow in Google Chrome - CVE-2021-21220

Vulnerability identifier: #VU52059

Vulnerability risk: Medium

CVSSv4.0: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2021-21220

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Google Chrome
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 overflow in V8 engine in Google Chrome. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger integer overflow and execute arbitrary code on the target system.

Note, successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires additional vulnerability to escape browser's sandbox.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Google Chrome: 88.0.4324.96 - 89.0.4389.114

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External links
https://twitter.com/r4j0x00
https://github.com/r4j0x00/exploits/tree/master/chrome-0day
https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html
https://crbug.com/1196683

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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?

Yes. This vulnerability is being exploited in the wild.