""ET EXPLOIT NodeBB Path Traversal (CVE-2021-43788)""

SID: 2034590

Revision: 1

Class Type: attempted-admin

Metadata: attack_target Server, created_at 2021_12_06, cve CVE_2021_43788, deployment Perimeter, deployment Internal, signature_severity Major, tag Exploit, updated_at 2021_12_06, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application

Reference:

  • cve

  • 2021-43788

Protocol: tcp

Source Network: any

Source Port: any

Destination Network: [$HOME_NET,$HTTP_SERVERS]

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "nodebb|2e|org|2f 3f 5b 5b 2e 2e 2f|"

  • Value: "|3a|"

  • Value: "|5d 5d|"

Within: 50

PCRE: "/|5d\x205d|$/U"

Special Options:

  • http_method

  • http_uri

  • nocase

  • fast_pattern

  • http_uri

  • http_uri

source