CVE-2015-1587 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Arbitrary File Upload in Maarch Letterbox. 📉 **Consequences**: Attackers upload PHP files to execute arbitrary code. 💥 **Impact**: Full system compromise via web shell.

Q: Root Cause? (CWE/Flaw)

🛡️ **CWE**: CWE-434 (Unrestricted Upload of File with Dangerous Type). 🐛 **Flaw**: The `file_to_index.php` script fails to validate file extensions or content, allowing malicious payloads.

Q: Who is affected? (Versions/Components)

🏢 **Vendor**: Maarch (French company). 📦 **Affected**: Maarch Letterbox v2.8 & earlier. 📦 **Also**: GEC/GED v1.4 & earlier. 📅 **Published**: Feb 19, 2015.

Q: What can hackers do? (Privileges/Data)

💻 **Privileges**: Remote Code Execution (RCE). 📂 **Data**: Access to server files, databases, and internal systems. 🕵️ **Action**: Hackers run PHP commands directly via uploaded scripts.

Q: Is exploitation threshold high? (Auth/Config)

🔓 **Auth**: Likely Low/None for initial upload vector. 🌐 **Config**: Requires direct request to `file_to_index.php`. ⚠️ **Threshold**: Low. Simple HTTP POST with a PHP file triggers it.

Q: Is there a public Exp? (PoC/Wild Exploitation)

💣 **Public Exp**: YES. 📜 **Ref**: Exploit-DB #35113. 🌍 **Status**: Wild exploitation possible. PacketStorm and OSVDB entries confirm active availability.

Q: How to self-check? (Features/Scanning)

🔍 **Check**: Scan for `file_to_index.php` endpoint. 📤 **Test**: Attempt upload of `.php` or `.phtml` files. 🛑 **Alert**: If server accepts and serves the file, it's vulnerable.

Q: Is it fixed officially? (Patch/Mitigation)

🩹 **Fix**: Upgrade to versions > 2.8 (Letterbox) or > 1.4 (GEC/GED). 📝 **Note**: Official patch details not in data, but version cutoff is clear. 🔄 **Action**: Update immediately.

Q: What if no patch? (Workaround)

🚧 **Workaround**: Block access to `file_to_index.php` via WAF. 🚫 **Restrict**: Disable file upload features if not needed. 🔒 **Validate**: Implement strict server-side file type checking.

Q: Is it urgent? (Priority Suggestion)

🔥 **Priority**: CRITICAL. 🚀 **Urgency**: High. RCE allows total takeover. 📉 **Risk**: Unpatched systems are wide open to automated bots. Act NOW.

Updated May 08, 2026

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Arbitrary File Upload in Maarch Letterbox. 📉 **Consequences**: Attackers upload PHP files to execute arbitrary code. 💥 **Impact**: Full system compromise via web shell.

Q2Root Cause? (CWE/Flaw)

🛡️ **CWE**: CWE-434 (Unrestricted Upload of File with Dangerous Type). 🐛 **Flaw**: The `file_to_index.php` script fails to validate file extensions or content, allowing malicious payloads.

Q3Who is affected? (Versions/Components)

🏢 **Vendor**: Maarch (French company). 📦 **Affected**: Maarch Letterbox v2.8 & earlier. 📦 **Also**: GEC/GED v1.4 & earlier. 📅 **Published**: Feb 19, 2015.

Q4What can hackers do? (Privileges/Data)

💻 **Privileges**: Remote Code Execution (RCE). 📂 **Data**: Access to server files, databases, and internal systems. 🕵️ **Action**: Hackers run PHP commands directly via uploaded scripts.

Q5Is exploitation threshold high? (Auth/Config)

🔓 **Auth**: Likely Low/None for initial upload vector. 🌐 **Config**: Requires direct request to `file_to_index.php`. ⚠️ **Threshold**: Low. Simple HTTP POST with a PHP file triggers it.

Q6Is there a public Exp? (PoC/Wild Exploitation)

💣 **Public Exp**: YES. 📜 **Ref**: Exploit-DB #35113. 🌍 **Status**: Wild exploitation possible. PacketStorm and OSVDB entries confirm active availability.

Q7How to self-check? (Features/Scanning)

🔍 **Check**: Scan for `file_to_index.php` endpoint. 📤 **Test**: Attempt upload of `.php` or `.phtml` files. 🛑 **Alert**: If server accepts and serves the file, it's vulnerable.

Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Fix**: Upgrade to versions > 2.8 (Letterbox) or > 1.4 (GEC/GED). 📝 **Note**: Official patch details not in data, but version cutoff is clear. 🔄 **Action**: Update immediately.

Q9What if no patch? (Workaround)

🚧 **Workaround**: Block access to `file_to_index.php` via WAF. 🚫 **Restrict**: Disable file upload features if not needed. 🔒 **Validate**: Implement strict server-side file type checking.

Q10Is it urgent? (Priority Suggestion)

🔥 **Priority**: CRITICAL. 🚀 **Urgency**: High. RCE allows total takeover. 📉 **Risk**: Unpatched systems are wide open to automated bots. Act NOW.

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