""ET EXPLOIT Citrix ShareFile Storage Zones Controller RCE Attempt (CVE-2021-22941)""

SID: 2034972

Revision: 1

Class Type: attempted-admin

Metadata: attack_target Server, created_at 2022_01_25, cve CVE_2021_22941, deployment Perimeter, deployment Internal, signature_severity Major, tag Exploit, updated_at 2022_01_25, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application

Reference:

  • cve

  • 2021-22941

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: [$HOME_NET,$HTTP_SERVERS]

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/upload.aspx"

  • Value: "id"

  • Value: "|40|"

  • Value: "|2e 2e 2f|"

  • Value: "|2e|cshtml"

  • Value: "bp"

  • Value: "accountid"

  • Value: "Content-Type|3a 20|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • fast_pattern

  • http_uri

  • http_uri

  • http_header

source