SID 1:42862

Rule Category

PROTOCOL-FTP -- Snort alerted on suspicious use of the FTP protocol. FTP is generally unsafe, as it sends all data in plain text, including passwords. Stolen data may also aggregate via FTP, and malware-infected items are often made available via FTP sharing sites. Malicious FTP attempts are common, such as directory traversal, overflow attempts, FTP probing (for instance, from the SATAN tool), etc.

Alert Message

PROTOCOL-FTP FTP server directory traversal attempt

Rule Explanation

This rule alerts on an attempted directory traversal via FTP.

What To Look For

This rule alerts on initial exploit traffic.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

MITRE::ATT&CK Framework::Enterprise::Initial Access::Exploit Public-Facing Application

Adversaries may attempt to take advantage of a weakness in an Internet-facing computer or program using software, data, or commands in order to cause unintended or unanticipated behavior. The weakness in the system can be a bug, a glitch, or a design vulnerability. These applications are often websites, but can include databases (like SQL), standard services (like SMB or SSH), network device administration and management protocols (like SNMP and Smart Install), and any other applications with Internet accessible open sockets, such as web servers and related services.

CVE

CVE-2017-6510

Rule Vulnerability

Directory Traversal

A Directory Traversal attack targets HTTP traffic and allows the attacker to access directories outside the applications own, potentially exposing sensitive system files to leakage or overwriting. This is also known as Directory Climbing, Path Traversal, or Backtracking. An alert on this kind of attack indicates a vulnerability in security validation of user input that allows a "traverse to parent directory" or "../" command to pass through. Protect your site by filtering all user input, removing any characters but the allowed data.

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.

CVE-2017-6510

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