""ET EXPLOIT Microsoft Exchange - Information Disclosure flowbit set (CVE-2021-33766)""

SID: 2033834

Revision: 2

Class Type: attempted-admin

Metadata: attack_target Server, created_at 2021_08_30, cve CVE_2021_33766, deployment Perimeter, deployment Internal, signature_severity Major, tag Exploit, updated_at 2021_08_30, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application

Reference:

• cve

• 2021-33766

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: [$HOME_NET,$HTTP_SERVERS]

Destination Port: any

Flow: established,to_server

Contents:

• Value: "/ecp/"

• Value: "SecurityToken="

Within:

PCRE:

Special Options:

• fast_pattern

• http_uri

• nocase

• http_cookie

source