Remote code execution in Microsoft Edge (Chromium-based)



Published: 2021-04-13 | Updated: 2021-04-15
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-21220
CWE-ID CWE-190
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 Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated: 15.04.2021

Changed bulletin status to patched.

1) Integer overflow

EUVDB-ID: #VU52059

Risk: Medium

CVSSv3.1: 7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2021-21220

CWE-ID: CWE-190 - Integer Overflow or Wraparound

Exploit availability: Yes

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

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

CPE2.3 External links

http://twitter.com/r4j0x00
http://github.com/r4j0x00/exploits/tree/master/chrome-0day
http://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop.html
http://crbug.com/1196683
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-21220

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, a fully functional exploit for this vulnerability is available.



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