CVE-2017-15715 — AI Deep Analysis Summary

🚨 **Essence**: Apache httpd fails to validate input correctly in `FilesMatch` expressions.…

🛡️ **Root Cause**: Improper input validation in regex matching. <br>❌ **Flaw**: The `$` anchor in regex matches a newline character (`\n`) in malicious filenames instead of just the end of the string.…

📦 **Affected**: Apache HTTP Server. <br>📅 **Versions**: **2.4.0** through **2.4.29**. <br>🏢 **Vendor**: Apache Software Foundation.

💻 **Capabilities**: Hackers can bypass external file upload blocks.…

⚡ **Threshold**: **Low**. <br>🔓 **Auth**: No authentication required for the exploit logic itself (depends on server config). <br>⚙️ **Config**: Exploits the specific behavior of `FilesMatch` regex.…

🌐 **Public Exp?**: **Yes**. <br>📂 **PoCs**: Available on GitHub (e.g., `vulhub`, `nuclei-templates`, `whisp1830`). <br>🔍 **Detection**: Easily detectable using automated scanners like Nuclei.

🔍 **Self-Check**: <br>1. Check Apache version (`httpd -v`). <br>2. Look for `FilesMatch` directives using regex with `$` anchors. <br>3. Test if filenames containing newlines bypass extension filters.

✅ **Fixed**: **Yes**. <br>🛠️ **Patch**: Updated in versions **2.4.30** and later. <br>📜 **Advisory**: Official security updates released by Apache and vendors like Red Hat (RHSA-2019:0367).

🚧 **No Patch?**: <br>1. **Upgrade** to Apache 2.4.30+ immediately. <br>2. **Mitigation**: Avoid using regex anchors like `$` in `FilesMatch` for file extension blocking.…

🔴 **Urgency**: **High**. <br>⚠️ **Priority**: Critical for servers using `FilesMatch` regex for security. <br>🚀 **Action**: Patch immediately to prevent arbitrary file upload attacks.…