Learn how to resolve the error message "Proxy authentication required" when you try to install a ClickOnce application created in the .NET Framework 2.0 onto a client computer with a proxy server. Download the hotfix from the MSDN Code Gallery or contact Microsoft support.

Provides links to the uninstall tools and directions for many security programs.

Resolves a remote code execution vulnerability that exists when Microsoft .NET Framework does not validate input correctly.

This security update resolves a vulnerability in the Microsoft .NET Framework that could allow remote code execution when Microsoft .NET Framework processes untrusted input. An attacker who successfully exploits this vulnerability by using the .NET Framework could take control of an affected system.

To exploit the vulnerability, an attacker must provide a URL string to an application that tries to verify that the URL belongs to a specific host name or to a subdomain of that host name.

Additionally, this update resolves a security feature bypass vulnerability in Windows that could allow an attacker to bypass Device Guard. An attacker who successfully exploits this vulnerability could circumvent a User Mode Code Integrity (UMCI) policy on the computer.

Locate the .NET Framework packages that match the operating systems, languages, and processors in your environment. Select Add to add them to your basket.

To remove this update, use the Programs and Features item in Control Panel. This update does not require a system restart after you apply it unless files that are being updated are locked or are being used. This update replaces previously released updates 4487078 and 4487256 and 4487081 and 4487259.

To exploit the vulnerability, an attacker would have to pass specific input to an application through susceptible .NET Framework methods. This security update addresses the vulnerability by correcting how .NET Framework validates input. To learn more about this vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2018-8284.

Se si applica questo hotfix entro 15 minuti dall'esecuzione di un'operazione ClickOnce, è necessario usare uno dei metodi seguenti per ottenere l'hotfix: Riavviare il computer client. Nel computer client chiudere tutte le applicazioni ClickOnce e quindi attendere che il processo di dfsvc. exe esca.