Remote code execution in Microsoft Edge (Chromium-based)



Published: 2021-04-15
Risk High
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-21206
CWE ID CWE-416
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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Microsoft Edge (Chromium-based)
Client/Desktop applications / Web browsers

Vendor Microsoft

Security Advisory

This security advisory describes one high risk vulnerability.

1) Use-after-free

Risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-21206

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Blink in Google Chrome. A remote attacker can trick the victim to visit a specially crafted web page, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from Microsoft website.

Vulnerable software versions

Microsoft Edge (Chromium-based): 79.0.309.71, 83.0.478.37, 84.0.522.40, 88.0.705.50, 88.0.705.62, 88.0.705.74, 89.0.774.45, 89.0.774.54, 89.0.774.68, 89.0.774.76

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-21206

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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