Remote code execution in Microsoft Edge



Published: 2021-09-14
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-30632
CWE ID CWE-787
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
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Microsoft Edge (Chromium-based)
Client/Desktop applications / Web browsers

Vendor Microsoft

Security Advisory

This security advisory describes one critical risk vulnerability.

1) Out-of-bounds write

Risk: Critical

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-30632

CWE-ID: CWE-787 - Out-of-bounds Write

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted HTML content in V8. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger out-of-bounds write and execute arbitrary code on the target system.

Note, the vulnerability is being actively exploited in-the-wild.

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, 86.0.622.43, 86.0.622.48, 86.0.622.51, 86.0.622.56, 86.0.622.58, 86.0.622.61, 86.0.622.63, 86.0.622.68, 86.0.622.69, 87.0.664.41, 87.0.664.47, 87.0.664.52, 87.0.664.55, 87.0.664.57, 87.0.664.60, 87.0.664.66, 87.0.664.75, 88.0.705.50, 88.0.705.53, 88.0.705.56, 88.0.705.62, 88.0.705.63, 88.0.705.68, 88.0.705.74, 88.0.705.81, 89.0.774.45, 89.0.774.48, 89.0.774.50, 89.0.774.54, 89.0.774.57, 89.0.774.63, 89.0.774.68, 89.0.774.75, 89.0.774.76, 89.0.774.77, 90.0.818.39, 90.0.818.41, 90.0.818.42, 90.0.818.46, 90.0.818.49, 90.0.818.51, 90.0.818.56, 90.0.818.62, 90.0.818.66, 91.0.864.37, 91.0.864.41, 91.0.864.48, 91.0.864.54, 91.0.864.59, 91.0.864.64, 91.0.864.67, 91.0.864.71, 92.0.902.55, 92.0.902.62, 92.0.902.67, 92.0.902.73, 92.0.902.78, 92.0.902.84, 93.0.961.38, 93.0.961.44

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-30632

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?

Yes. This vulnerability is being exploited in the wild.



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