CVE-2009-1535 — AI Deep Analysis Summary

🚨 **Essence**: A critical **Authorization Bypass** in Microsoft IIS WebDAV. 📉 **Consequences**: Attackers can bypass URI-based protection to **list folders**, **read**, **create**, or **modify** files.…

🛡️ **Root Cause**: The flaw lies in the **WebDAV extension**'s authorization logic. It fails to properly enforce access controls based on the URI.…

🌍 **Affected**: **Microsoft Internet Information Services (IIS)**. Specifically **Version 5.1** and **Version 6.0**. 🖥️ These are older Windows Server platforms running the WebDAV extension.

🕵️ **Attacker Capabilities**: With this vulnerability, hackers can: 1️⃣ **List directory contents** (reconnaissance). 2️⃣ **Read sensitive files**. 3️⃣ **Create new files**. 4️⃣ **Modify existing files**.…

🔓 **Exploitation Threshold**: **Low to Medium**. The description highlights an **authorization issue**, implying that standard URI protections are ineffective.…

📢 **Public Exploit**: The provided data lists **no specific PoC code** (pocs array is empty).…

🔍 **Self-Check**: Scan for **IIS 5.1/6.0** servers with the **WebDAV extension** enabled. Look for HTTP methods like **PROPFIND**, **PROPPATCH**, or **MKCOL** which are WebDAV-specific.…

🩹 **Official Fix**: The data references **US-CERT TA09-160A** and **OVAL definitions**, indicating that official patches or mitigations were released by Microsoft around **June 2009**.…

🚧 **No Patch Workaround**: If you cannot patch, **disable the WebDAV extension** entirely if not needed.…

🚨 **Urgency**: **HIGH** for legacy systems. Although old (2009), IIS 6.0 is still found in some legacy environments. If unpatched, it allows **unauthorized file manipulation**.…