""ET EXPLOIT Microsoft Exchange RCE Setup Inbound (CVE-2021-28482)""

SID: 2032897

Revision: 2

Class Type: attempted-admin

Metadata: affected_product Microsoft_Exchange, attack_target Server, created_at 2021_05_04, cve CVE_2021_28482, deployment Perimeter, deployment Internal, signature_severity Major, updated_at 2022_12_23

Reference:

  • cve

  • 2021-28482

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: "/ews/Exchange.asmx"

  • Value: "ProposeOptionsMeeting"

  • Value: "&quot|3b|&gt|3b|cmd"

  • Value: "Value&gt|3b|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • http_client_body

  • fast_pattern

  • http_client_body

source