CVE-2021-24112: .NET Core Remote Code Execution Vulnerability

Overview

Severity

High (CVSS 8.1)

CVSS Vector

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

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2021-Feb

Released

2021-02-09

Last Updated

2021-02-24

EPSS Score

1.11% (percentile: 78.1%)

FAQ

How could an attacker exploit this vulnerability? When a .NET application utilizing libgdiplus on a non-Windows system accepts input, an attacker could send a specially crafted request that could result in remote code execution. Does this vulnerability affect applications running on Windows? No, Windows utilizes GDI+ to process these requests, and is not affected by this vulnerability.

Affected Products (5)

Developer Tools

• Visual Studio 2019 for Mac
• Mono 6.12.0
• .NET Core 2.1
• .NET Core 3.1
• .NET 5.0

Security Updates (5)

• Release Notes
• Release Notes
• Release Notes
• Release Notes
• Release Notes

Revision History

• 2021-02-09: Information published.
• 2021-02-24: In the Security Updates table, added Visual Studio 2019 for Mac and Mono 6.12.0 because they are also affected by CVE-2021-24112. Microsoft recommends that customers running either of these products install the updates to be fully protected from the vulnerability.