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CVE-2020-37067 โ€” AI Deep Analysis Summary

CVSS 9.8 ยท Critical

Q1What is this vulnerability? (Essence + Consequences)

๐Ÿšจ **Essence**: Filetto FTP Server (v1.0) has a critical flaw in handling the **FEAT command**. <br>๐Ÿ’ฅ **Consequences**: Triggers a **Denial of Service (DoS)**.โ€ฆ

Q2Root Cause? (CWE/Flaw)

๐Ÿ›ก๏ธ **CWE**: CWE-770 (Allocation of Resources Without Limits or Throttling). <br>๐Ÿ” **Flaw**: Poor input validation in the **FEAT command** parser.โ€ฆ

Q3Who is affected? (Versions/Components)

๐Ÿ“ฆ **Vendor**: Utillyty. <br>๐Ÿ“‚ **Product**: Filetto. <br>๐Ÿ“… **Affected Version**: **1.0** specifically. <br>๐ŸŒ **Type**: Open-source FTP server software.

Q4What can hackers do? (Privileges/Data)

๐Ÿ‘ฎ **Privileges**: No authentication required (PR:N). <br>๐Ÿ“‰ **Impact**: **High** availability impact. <br>๐Ÿšซ **Action**: Hackers can simply send a crafted FEAT packet to **crash the service**.โ€ฆ

Q5Is exploitation threshold high? (Auth/Config)

๐Ÿ”“ **Threshold**: **LOW**. <br>๐ŸŒ **Access**: Network Accessible (AV:N). <br>๐Ÿ”‘ **Auth**: None needed (PR:N). <br>๐Ÿ‘ค **User Interaction**: None needed (UI:N). <br>โšก **Complexity**: Low (AC:L). Easy to trigger remotely!

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

๐Ÿ’ฃ **Exploit**: **YES**. <br>๐Ÿ“„ **Source**: ExploitDB ID **48503** is available. <br>๐Ÿ”— **Advisory**: VulnCheck has published a detailed advisory. <br>โš ๏ธ **Status**: Publicly available PoC/Exploit exists.

Q7How to self-check? (Features/Scanning)

๐Ÿ” **Check**: Scan for **Filetto** banners on FTP ports (21). <br>๐Ÿ“ก **Test**: Send a malformed or specific **FEAT command** and observe if the connection drops unexpectedly.โ€ฆ

Q8Is it fixed officially? (Patch/Mitigation)

๐Ÿฉน **Patch**: The data does not list a specific patch version. <br>๐Ÿ“ **Mitigation**: Since it's an open-source project (SourceForge), check the official repo for updates.โ€ฆ

Q9What if no patch? (Workaround)

๐Ÿ›‘ **Workaround**: **Block external access** to the FTP server. <br>๐Ÿ”’ **Firewall**: Restrict FTP port (21) to trusted IPs only. <br>๐Ÿ”„ **Alternative**: Switch to a more robust, maintained FTP server software if possible.

Q10Is it urgent? (Priority Suggestion)

๐Ÿ”ฅ **Priority**: **HIGH**. <br>โšก **Reason**: CVSS Score is **9.8** (Critical). <br>๐Ÿ“‰ **Risk**: Easy to exploit, no auth needed, causes total service outage.โ€ฆ