X-aspnet-version 4.0.3 Vulnerabilities Link

curl -s -D - https://yourdomain.com/ -o /dev/null | grep -i X-AspNet-Version Automated scanning (using nmap + http-headers script):

Response.Headers.Remove("X-AspNet-Version"); x-aspnet-version 4.0.3 vulnerabilities

nmap -p 443 --script http-headers yourdomain.com | grep "X-AspNet-Version" X-AspNet-Version: 4.0.3 is a high-value signal for attackers targeting end-of-life ASP.NET applications. Removing the header via enableVersionHeader="false" is a simple but mandatory first step. However, due to the unsupported nature of .NET 4.0.3, organizations must prioritize migration to a supported .NET runtime. Relying solely on header suppression offers no protection against known remote code execution or padding oracle vulnerabilities. Appendix: Sample Exploit Test (Educational Use Only) Simulating CVE-2014-4072 using padbuster (Kali Linux): curl -s -D - https://yourdomain

padbuster https://target.com/page.aspx encryptedVIEWSTATE <block-size> -cookies "ASP.NET_SessionId=..." -encoding Base64 This attack succeeds only if the X-AspNet-Version: 4.0.3 is confirmed and no upgrade has been performed. Relying solely on header suppression offers no protection