Rule Document 1:519

Rule Category

PROTOCOL-TFTP -- Snort has detected traffic that may indicate the presence of the tftp protocol or vulnerabilities in the tftp protocol on the network.

Alert Message

PROTOCOL-TFTP parent directory

Rule Explanation

This rule looks for a path traversal sequence present in TFTP traffic.

What To Look For

This rule alerts on potential path traversal attempts through TFTP.

Known Usage

No public information

False Positives

Known false positives, with the described conditions

This rule will alert whenever a ".." sequence is detected in TFTP traffic.

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.

Rule Categories::Protocol::TFTP

Vulnerability::Severity::High

Vulnerability::Severity::Critical

Vulnerability::Severity::Medium

CVE

CVE-1999-0183 CVE-2002-1209 CVE-2011-4722 CVE-2007-0888

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-1999-0183

Loading description

CVE-2002-1209

Loading description

CVE-2011-4722

Loading description

CVE-2007-0888

Loading description