Checking for preinstalled backdoor functionality

Details of BNVL-2018-0042

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 analyzis by the AI-powered Attack Vector Miner. More than 100 vulnerabilty types have been discovered with this project so far, so we decided to publish this platform to help keeping 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

BNVL identifiers are free to use in any related security reports, web pages or e-mails.

Name: Checking for preinstalled backdoor functionality

CVE ID: (Not set)

Related links: (There are no links!)
Description:

The request is a test for a previously installed PHP backdoor. The c&c server is sending a small string and then checks the result to test if the backdoor is still functional or not.

Incident volume (Last 14 days)