Microsoft Net Framework 4.0 V 30319 Vulnerabilities !exclusive!

, as well as subsequent versions in the 4.x family (such as 4.5, 4.6, 4.7, and 4.8). Because .NET 4.0 reached its End of Life (EOL)

System.Text.RegularExpressions before the security update introduced timeout mechanisms. Unpatched versions have no MatchTimeout defaults, making any public regex endpoint vulnerable.

Microsoft patched this in December 2018. Unpatched 4.0.30319 systems remain at risk.

Many legacy .NET 4.0 apps were never reconfigured to use AES instead of 3DES, and error messages were not suppressed.

Look for Version = 4.0.30319.xxxxx . The build number after the dot indicates the update level:

: Vulnerabilities in associated tools (like older file managers) could allow attackers to write malicious files into arbitrary system folders. Denial of Service

– In web.config :