frack113
37 lines
1.4 KiB
YAML
37 lines
1.4 KiB
YAML
title: Citrix Netscaler Attack CVE-2019-19781
|
|
id: ac5a6409-8c89-44c2-8d64-668c29a2d756
|
|
status: test
|
|
description: Detects CVE-2019-19781 exploitation attempt against Citrix Netscaler, Application Delivery Controller and Citrix Gateway Attack
|
|
references:
|
|
- https://support.citrix.com/article/CTX267679
|
|
- https://support.citrix.com/article/CTX267027
|
|
- https://isc.sans.edu/diary/25686
|
|
- https://twitter.com/mpgn_x64/status/1216787131210829826
|
|
- https://github.com/x1sec/CVE-2019-19781/blob/25f7ab97275b2d41800bb3414dac8ca3a78af7e5/CVE-2019-19781-DFIR.md
|
|
author: Arnim Rupp, Florian Roth
|
|
date: 2020/01/02
|
|
modified: 2023/01/02
|
|
tags:
|
|
- attack.initial_access
|
|
- attack.t1190
|
|
logsource:
|
|
category: webserver
|
|
definition: 'Make sure that your Netscaler appliance logs all kinds of attacks (test with http://your-citrix-gw.net/robots.txt). The directory traversal with ../ might not be needed on certain cloud instances or for authenticated users, so we also check for direct paths. All scripts in portal/scripts are exploitable except logout.pl.'
|
|
detection:
|
|
selection_cs:
|
|
- cs-uri-query|contains: '/../vpns/'
|
|
- cs-uri-query|endswith: '/vpns/cfg/smb.conf'
|
|
selection_csall:
|
|
cs-uri-query|contains|all:
|
|
- '/vpns/portal/scripts/'
|
|
- '.pl'
|
|
condition: 1 of selection_*
|
|
fields:
|
|
- client_ip
|
|
- vhost
|
|
- url
|
|
- response
|
|
falsepositives:
|
|
- Unknown
|
|
level: critical
|