Remote code execution in Microsoft .NET and Visual Studio

1) Input validation error

EUVDB-ID: #VU72215

Risk: High

CVSSv4.0: 8.1 [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/E:U/U:Amber]

CVE-ID: CVE-2023-21808

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input when parsing certain symbols. A remote attacker can pass specially crafted input to the application and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Visual Studio: 15.9 - 17.4.4 17.4.33213.308

Microsoft .NET Framework: 3.5 - 4.8.1

Microsoft .NET Core: 6.0.0 - 7.0.2

CPE2.3

• cpe:2.3:a:microsoft:visual_studio:15.9.51:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:visual_studio:16.0.22:16.0.28803.916:*:*:*:*:*:*
• cpe:2.3:a:microsoft:visual_studio:16.11.23:16.11.33214.272:*:*:*:*:*:*
• cpe:2.3:a:microsoft:visual_studio:16.2.5:16.2.29306.81:*:*:*:*:*:*
• cpe:2.3:a:microsoft:visual_studio:16.3.10:16.3.29519.87:*:*:*:*:*:*
• cpe:2.3:a:microsoft:visual_studio:16.4.27:16.4.31728.76:*:*:*:*:*:*
• cpe:2.3:a:microsoft:visual_studio:16.5.5:16.5.30104.148:*:*:*:*:*:*
• cpe:2.3:a:microsoft:visual_studio:16.6.5:16.6.30320.27:*:*:*:*:*:*
• cpe:2.3:a:microsoft:visual_studio:16.7.28:16.7.32413.119:*:*:*:*:*:*
• cpe:2.3:a:microsoft:visual_studio:16.8.7:16.8.31025.109:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_net_framework:3.5:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:microsoft_.net_core:6.0.13:*:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21808

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.