""ET EXPLOIT FortiOS SSL VPN - Pre-Auth Messages Payload Buffer Overflow (CVE-2018-13381)""

SID: 2027884

Revision: 2

Class Type: attempted-admin

Metadata: affected_product Fortigate, attack_target Networking_Equipment, created_at 2019_08_14, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2019_08_14

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: any

Destination Network: $HOME_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/message" Depth: 8

  • Value: "&msg=%26%23%3c"

Within:

PCRE: "/(?:\%3C){1000}/Ri"

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • fast_pattern

  • nocase

source