#VU79606 Heap-based buffer overflow in Google Chromium - CVE-2021-4321

Vulnerability identifier: #VU79606

Vulnerability risk: Low

CVSSv4.0: 0.5 [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/E:U/U:Clear]

CVE-ID: CVE-2021-4321

CWE-ID: CWE-122

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 perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when processing untrusted HTML content in Autofill. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger a heap-based buffer overflow and crash the browser.

Mitigation
Update to version 91.0.4472.77.

Vulnerable software versions

Google Chromium: before 91.0.4472.77

---

External links
https://chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop_25.html
https://crbug.com/1161891

---

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.