Main Vulnerability Database Vulnerabilities #VU72209

Input validation error in Microsoft Windows and Windows Server - CVE-2023-21803

Published: February 14, 2023

Vulnerability identifier: #VU72209

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-21803

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise the affected system

The vulnerability exists due to insufficient validation of user-supplied input within the Windows iSCSI Discovery Service. A remote attacker can send a specially crafted malicious DHCP discovery request to the iSCSI Discovery Services and execute arbitrary code on the system.

Note, only x86 or 32-bit based versions of Windows are affected by this vulnerability.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2023-21803

Install updates from vendor's website.

External References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21803

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