""ET EXPLOIT DNS Change Attempt (Unknown Device)""

SID: 2031804

Revision: 2

Class Type: attempted-admin

Metadata: affected_product Router, attack_target Networking_Equipment, created_at 2021_03_03, deployment Internal, performance_impact Low, signature_severity Major, tag DNS_Hijack, updated_at 2021_03_03

Reference:

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: $HOME_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/advWAN.cgi" Depth: 11

  • Value: "tAction=editApply"

  • Value: "viewPage=multiWANCfg"

  • Value: "action=edit"

  • Value: "dns1="

  • Value: "dns2="

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

source