Microsoft ASP.NET Core CVE-2019-0545 Information Disclosure Vulnerability

Description

Microsoft ASP.NET Core is prone to an information disclosure vulnerability. Successful exploits will allow attackers to obtain sensitive information that may aid in further attacks.

Technologies Affected

• Microsoft .NET Core 2.1
• Microsoft .NET Core 2.2
• Microsoft .NET Core 2.3
• Microsoft .NET Framework 2.0
• Microsoft .NET Framework 3.0
• Microsoft .NET Framework 3.5
• Microsoft .NET Framework 3.5.1
• Microsoft .NET Framework 4.5.2
• Microsoft .NET Framework 4.6
• Microsoft .NET Framework 4.6.2
• Microsoft .NET Framework 4.7
• Microsoft .NET Framework 4.7.1
• Microsoft .NET Framework 4.7.2

Recommendations

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits

Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Updates are available. Please see the references or vendor advisory for more information.