Scan for open FTP server

Details of BNVL-2019-0010

What does the BNVL label mean?

BitNinja Server Security’s BNVL identifiers are intended for use to identify publicly known information security vulnerabilities in publicly released software packages. This project was designed to collect and analyze attack information from the BitNinja network after cluster analysis by the AI-powered Attack Vector Miner. More than 100 vulnerability types have been discovered with this project so far, so we decided to publish this platform to help to keep Linux server owners up-to-date.

Important! All listed BNVL vulnerabilities are protected by BitNinja PRO, so please check your configurations if your infrastructure is affected by any of them.

Syntax for BNVL labels:

BNVL prefix + Year + Arbitrary Digits


Name : 
Scan for open FTP server
Related Links: https://www.owasp.org/index.php/Testing_for_Command_Injection_(OTG-INPVAL-013)

CVE ID: Na

Description: 
There is a huge botnet on the Internet scanning for open FTP servers. The bots first tries to log in using a dictionary based FTP bruteforce. On a successful login, it uploads the file GXHLGSL.txt into multiple directories and then tries to find out if the file can be accessed on HTTP to collect proof of the open FTP proxy and prepare the infection phase. This incident is the FTP upload attempt part of the attack. BitNinja CaptchaFTP module has perceived a file upload attempt with the filename GXHLGSL.txt. This is a proof that the user of the offending IP is infected.

Pattern: “data”: “STOR – GXHLGSL.txt