CVE-2017-7921 PoC — 多款Hikvision产品安全漏洞

Source

https://github.com/lastvocher/Hikvision-CVE-2017-7921-decryptor

Associated Vulnerability

Title:多款Hikvision产品安全漏洞 (CVE-2017-7921)
Description:Hikvision DS-2CD2xx2F-I Series等都是中国海康威视（Hikvision）公司的网络摄像头产品。多款Hikvision产品中存在身份验证漏洞。攻击者可利用该漏洞提升权限，获取敏感信息的访问权限。以下产品和版本受到影响：Hikvision DS-2CD2xx2F-I Series 5.2.0 build 140721版本至5.4.0 build 160530版本；DS-2CD2xx0F-I Series 5.2.0 build 140721版本至5.4.0 Build 16040

Readme

# hikvision_CVE-2017-7921_auth_bypass_config_decryptor
This python file will decrypt the configurationFile used by hikvision cameras vulnerable to CVE-2017-7921.

https://www.checkpoint.com/defense/advisories/public/2017/cpai-2017-0876.html/

# Description 

Hikvision IP Cameras Authentication Bypass (CVE-2017-7921)

Basically, hikvision cameras that are vulnerable to the CVE listed above, can have several routes exposed by using a simple base64 string supplied as an argument in the url. 

For example:

`/System/configurationFile?auth=YWRtaW46MTEK`

This would allow an unauthenticated user to download the config file for the camera which includes user information. This configuration file uses weak encryption and a static key by default.

The python script supplied, will decrypt this configuration file. 

I also supply a sample generated example configuration file for you to test. 

# How To Use

`./decrypt_configurationFile.py <nameofdownloadedconfig>`


# Dependencies:

`sudo python3 -m pip install pycryptodome`

**Tested on Ubunut 20.04 with python 3.8.5**

File Snapshot


 [4.0K]  /data/pocs/0f8c91b8dfedfdbae133faceff6e819731aad060
├── [867K]  configurationFile
├── [1.2K]  decrypt_configurationFile.py
├── [1.0K]  LICENSE
└── [1.0K]  README.md

1 directory, 4 files

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