Buffer overflow in Microsoft products - CVE-2021-34480
Published: August 10, 2021 / Updated: July 24, 2023
Vulnerability identifier: #VU55726
CSH Severity: Medium
CVSS v4.0: 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-2021-34480
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Microsoft
Affected software:
Windows
Windows Server
Microsoft Internet Explorer
Windows
Windows Server
Microsoft Internet Explorer
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to incorrect JIT optimization in jscript9.dll in the Scripting Engine. A remote attacker can trick a victim to open a specially crafted file or visit a malicious website, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2021-34480
Install updates from vendor's website.