CVE-2013-6955 — AI Deep Analysis Summary

🚨 **Essence**: Remote Command Execution (RCE) via `imageSelector.cgi`. 📉 **Consequences**: Attackers can append data to arbitrary files and execute **arbitrary code** on the NAS.…

🛡️ **Root Cause**: Improper handling of the `SLICEUPLOAD X-TMP-FILE` HTTP header. 🐛 **Flaw**: The path name in this header is not sanitized, allowing **file path injection**.…

🏢 **Vendor**: Synology (群晖科技). 🖥️ **Product**: DiskStation Manager (DSM). 📦 **Affected Versions**: DSM **4.3-3776-3 and earlier**. 📂 **Component**: `webman/imageSelector.cgi`.

👑 **Privileges**: Remote attackers gain the ability to execute code with the privileges of the web server process. 📄 **Data**: Can append data to **arbitrary files**.…

🔓 **Auth**: Likely **Remote** (unauthenticated) or low-privilege, as it involves a CGI file handling HTTP headers. 📡 **Config**: Exploits the `SLICEUPLOAD` header mechanism.…

📜 **Public Exp**: No specific PoC code provided in the data. 🔗 **Reference**: CERT Advisory VU#615910 exists.…

🔍 **Check**: Scan for `imageSelector.cgi` endpoints. 📡 **Test**: Send crafted `SLICEUPLOAD X-TMP-FILE` headers with malicious paths. 🛠️ **Tool**: Use vulnerability scanners targeting Synology DSM versions < 4.3-3776-3.

🩹 **Fix**: Upgrade DSM to a version **newer than 4.3-3776-3**. 📅 **Published**: Advisory released 2014-01-09. ✅ **Official**: Yes, patching is the primary mitigation.

🚫 **Workaround**: Restrict access to `imageSelector.cgi` via firewall rules. 🛑 **Block**: Prevent external access to the web management interface. 🧱 **Mitigate**: Disable unnecessary upload features if possible.

🔥 **Urgency**: **HIGH**. 🚨 **Reason**: RCE allows full NAS takeover. 💾 **Risk**: Critical data loss or ransomware installation. ⏳ **Action**: Patch immediately if running affected versions.