""ET WEB_SPECIFIC_APPS XML External Entity Remote Code Execution""

SID: 2025878

Revision: 2

Class Type: attempted-user

Metadata: attack_target Web_Server, created_at 2018_07_20, deployment Datacenter, performance_impact Low, signature_severity Major, updated_at 2018_07_20, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: any

Destination Network: $HTTP_SERVERS

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "<?xml version=|22|1.0|22| encoding="

  • Value: "<!DOCTYPE"

  • Value: "<!ENTITY"

  • Value: "SYSTEM |22|php|3a|//"

Within:

PCRE:

Special Options:

  • http_method

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • fast_pattern

source