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Detection rules › Sigma

Fortinet CVE-2018-13379 Exploitation

Status
test
Severity
critical
Log source
category webserver
Author
Bhabesh Raj
Source
github.com/SigmaHQ/sigma

Detects CVE-2018-13379 exploitation attempt against Fortinet SSL VPNs

MITRE ATT&CK coverage

TacticTechniques
Initial AccessT1190 Exploit Public-Facing Application

Rule body yaml

title: Fortinet CVE-2018-13379 Exploitation
id: a2e97350-4285-43f2-a63f-d0daff291738
status: test
description: Detects CVE-2018-13379 exploitation attempt against Fortinet SSL VPNs
references:
    - https://devco.re/blog/2019/08/09/attacking-ssl-vpn-part-2-breaking-the-Fortigate-ssl-vpn/
author: Bhabesh Raj
date: 2020-12-08
modified: 2023-01-02
tags:
    - attack.initial-access
    - attack.t1190
    - cve.2018-13379
    - detection.emerging-threats
logsource:
    category: webserver
detection:
    selection:
        cs-uri-query|contains|all:
            - 'lang=/../../'
            - '/dev/cmdb/sslvpn_websession'
    condition: selection
falsepositives:
    - Unknown
level: critical

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    cs-uri-query|contains|all:
        - 'lang=/../../'
        - '/dev/cmdb/sslvpn_websession'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
cs-uri-querymatch
  • /dev/cmdb/sslvpn_websession
  • lang=/../../