""ET EXPLOIT Microsoft Exchange SUID Disclosure via SSRF Inbound M2 (CVE-2021-31207)""

SID: 2035648

Revision: 2

Class Type: attempted-admin

Metadata: affected_product Microsoft_Exchange, attack_target Server, created_at 2022_03_29, cve CVE_2021_31207, deployment Perimeter, deployment Internal, deployment SSLDecrypt, signature_severity Major, tag Exploit, updated_at 2022_12_23, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application

Reference:

  • cve

  • 2021-31207

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: [$HOME_NET,$HTTP_SERVERS]

Destination Port: [443,444,$HTTP_PORTS]

Flow: established,to_server

Contents:

  • Value: "/autodiscover"

  • Value: "/mapi/emsmdb"

  • Value: "Email=autodiscover/"

Within:

PCRE:

Special Options:

  • nocase

  • http_uri

  • nocase

  • fast_pattern

  • http_uri

  • nocase

  • http_cookie

source