CVE-2011-3414 — AI Deep Analysis Summary

🚨 **Essence**: A Remote Denial of Service (DoS) flaw in Microsoft ASP.NET. 💥 **Consequences**: Attackers trigger **hash collisions** via crafted form requests.…

🛡️ **Root Cause**: The vulnerability lies in how ASP.NET handles **form request values**. It fails to prevent **hash table collisions**, leading to inefficient processing and resource exhaustion.

🌐 **Affected**: Microsoft ASP.NET environments. Specifically, sites using ASP.NET that process standard form requests. (Note: Vendor/Product fields in data are 'n/a', but title confirms Microsoft ASP.NET).

🕵️ **Attacker Action**: Hackers send **special crafted ASP.NET form requests**. They do **not** gain data access or privileges. The goal is purely **disruption** (DoS) by crashing the service via high CPU load.

🔓 **Exploitation Threshold**: **Low**. It is a **Remote** vulnerability. No authentication is required. Attackers just need network access to send the malicious HTTP form requests to the target site.

📜 **Public Exploit**: The data lists **no specific PoC code** (`pocs: []`). However, multiple **advisories** (CERT, Bugtraq, Microsoft MS11-100) confirm the vulnerability is known and exploitable in the wild.

🔍 **Self-Check**: Monitor server logs for **abnormal CPU spikes** correlated with form submissions. Check if the server is running vulnerable versions of ASP.NET. Use vulnerability scanners targeting **MS11-100**.

✅ **Official Fix**: **Yes**. Microsoft released **MS11-100** to patch this issue. Refer to the Microsoft Security Bulletin for the official update.

🚧 **No Patch Workaround**: If unpatched, implement **Web Application Firewall (WAF)** rules to block suspicious form payloads. Rate-limit form submissions to mitigate the impact of hash collision attacks.

⚡ **Urgency**: **High**. It allows remote DoS with **no authentication**. While it doesn't steal data, it takes down services. Apply the **MS11-100** patch immediately to ensure availability.