CVE-2023-21803: Windows iSCSI Discovery Service Remote Code Execution Vulnerability

Overview

Severity

Critical (CVSS 9.8)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2023-Feb

Released

2023-02-14

EPSS Score

13.93% (percentile: 94.3%)

FAQ

How could an attacker exploit the vulnerability? An attacker could exploit the vulnerability by sending a specially crafted malicious DHCP discovery request to the iSCSI Discovery Service on 32-bit machines. An attacker who successfully exploited the vulnerability could then gain the ability to execute code on the target system.

Affected Products (8)

Windows

• Windows 10 Version 1809 for 32-bit Systems
• Windows 10 Version 20H2 for 32-bit Systems
• Windows 10 Version 21H2 for 32-bit Systems
• Windows 10 Version 22H2 for 32-bit Systems
• Windows 10 for 32-bit Systems
• Windows 10 Version 1607 for 32-bit Systems

ESU

• Windows Server 2008 for 32-bit Systems Service Pack 2
• Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)

Security Updates (6)

• 5022840
• 5022834
• 5022858
• 5022838
• 5022890
• 5022893

Acknowledgments

<a href="https://twitter.com/4zure9">Azure Yang</a> with <a href="http://www.cyberkl.com/">Kunlun Lab</a>

Revision History

• 2023-02-14: Information published.