""ET EXPLOIT Possible Citrix Authentication Bypass Attempt Inbound (CVE-2020-8193)""

SID: 2031067

Revision: 2

Class Type: attempted-admin

Metadata: created_at 2020_10_21, cve CVE_2020_8193, deployment Perimeter, deployment Internal, performance_impact Low, signature_severity Major, updated_at 2020_10_21

Reference:

  • cve

  • 2020-8193

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: [$HOME_NET,$HTTP_SERVERS]

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "&sid=loginchallenge"

  • Value: "&username=nsroot"

  • Value: "<appfwprofile" Depth: 13

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_uri

  • fast_pattern

  • http_client_body

source