CVE-2025-6121 — AI Deep Analysis Summary

🚨 **Essence**: Stack-based buffer overflow in D-Link DIR-632. 📉 **Consequences**: Remote Code Execution (RCE), full system compromise. 💥 **Impact**: Critical severity (CVSS 9.8).…

🛡️ **Root Cause**: CWE-121 (Stack-based Buffer Overflow). 🐛 **Flaw**: Improper handling of `Content-Length` in the `get_pure_content` function within the HTTP POST Request Handler.…

🏢 **Vendor**: D-Link (China). 📦 **Product**: DIR-632 Router. 📅 **Affected Version**: FW103B08. ⚠️ **Scope**: Specific firmware version only.

🕵️ **Privileges**: Attacker gains **High** privileges (likely root/system level). 📂 **Data**: Full access to sensitive data. 🌐 **Control**: Complete control over the router and potentially the local network.

🔓 **Auth**: None required (PR:N). 🌍 **Access**: Network accessible (AV:N). 🚀 **Complexity**: Low (AC:L). ✅ **Verdict**: Extremely easy to exploit. No user interaction needed (UI:N).

💻 **Exploit**: Yes, public PoC exists. 🔗 **Source**: GitHub repo by xiaobor123. 📂 **Location**: `vul-finds/tree/main/vul-find-dir632-dlink-get_pure_content`. 🚨 **Status**: Active exploitation possible.

🔍 **Check**: Scan for D-Link DIR-632 devices. 📡 **Feature**: Test HTTP POST requests with malformed `Content-Length`. 🛠️ **Tool**: Use existing PoC scripts from GitHub. 📋 **Verify**: Check if running FW103B08.

🩹 **Patch**: Not explicitly mentioned in data. 📅 **Published**: 2025-06-16. ⏳ **Status**: Likely unpatched or patch pending. 📞 **Action**: Contact vendor immediately for FW103B08 update.

🚧 **Workaround**: Block external HTTP access to router. 🛑 **Mitigation**: Disable WAN access to management interface. 📡 **Network**: Isolate router from untrusted networks.…

🔥 **Urgency**: CRITICAL. 🚨 **Priority**: Immediate action required. 📉 **Risk**: High due to low exploitation barrier. 🏃 **Action**: Patch or isolate NOW. ⏰ **Time**: Do not delay.