""ET EXPLOIT Possible Zyxel Authentication Bypass Inbound (CVE-2021-3297)""

SID: 2032523

Revision: 2

Class Type: attempted-user

Metadata: attack_target Networking_Equipment, created_at 2021_04_06, cve CVE_2021_3297, deployment Perimeter, deployment Internal, signature_severity Major, updated_at 2021_04_06

Reference:

  • cve

  • 2021-3297

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "/login_ok.htm"

  • Value: "login=1"

Within:

PCRE:

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_cookie

source