CVE-2021-34448: Scripting Engine Memory Corruption Vulnerability

Overview

Severity

Medium (CVSS 6.8)

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Actively Exploited

Exploitation Likelihood

Detected

Patch Tuesday

2021-Jul

Released

2021-07-13

EPSS Score

2.03% (percentile: 83.8%)

CISA KEV

Listed — due 2021-11-17

FAQ

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do? In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerability. However, an attacker would have no way to force the user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the specially crafted file.

Affected Products (29)

Windows

• Windows 10 Version 1809 for 32-bit Systems
• Windows 10 Version 1809 for x64-based Systems
• Windows 10 Version 1809 for ARM64-based Systems
• Windows Server 2019
• Windows 10 Version 1909 for 32-bit Systems
• Windows 10 Version 1909 for x64-based Systems
• Windows 10 Version 1909 for ARM64-based Systems
• Windows 10 Version 21H1 for x64-based Systems
• Windows 10 Version 21H1 for ARM64-based Systems
• Windows 10 Version 21H1 for 32-bit Systems
• Windows 10 Version 2004 for 32-bit Systems
• Windows 10 Version 2004 for ARM64-based Systems
• Windows 10 Version 2004 for x64-based Systems
• Windows 10 Version 20H2 for x64-based Systems
• Windows 10 Version 20H2 for 32-bit Systems
• Windows 10 Version 20H2 for ARM64-based Systems
• Windows 10 for 32-bit Systems
• Windows 10 for x64-based Systems
• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016
• Windows 8.1 for 32-bit systems
• Windows 8.1 for x64-based systems
• Windows RT 8.1
• Windows Server 2012
• Windows Server 2012 R2

ESU

• Windows 7 for 32-bit Systems Service Pack 1
• Windows 7 for x64-based Systems Service Pack 1
• Windows Server 2008 R2 for x64-based Systems Service Pack 1

Security Updates (9)

• 5004244
• 5004245
• 5004237
• 5004249
• 5004238
• 5004289
• 5005563
• 5004298
• 5004294

Acknowledgments

yangkang(@dnpushme)&bianliang&wanggang&lihongfei&liujialei of 360 ATA

Revision History

• 2021-07-13: Information published.