""ET WEB_SPECIFIC_APPS Fortigate FortiOS Invalid HTTP Chunk Length Out of Bounds Write Remote Code Execution Attempt (CVE-2024-21762) - Heap Manipulation""

SID: 2051766

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Fortigate, attack_target Networking_Equipment, tls_state TLSDecrypt, created_at 2024_03_22, cve CVE_2024_21762, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_03_22, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application

Reference:

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: any

Destination Network: $HOME_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/remote/"

  • Value: "/bin/node|25 30 30|"

  • Value: "|2d|e|25 30 30|"

Within: 20

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_client_body

  • fast_pattern

  • http_client_body

source