Moxa EDR-810 Cleartext Transmission of Password Vulnerability

Summary

An exploitable clear text transmission of password vulnerability exists in the web server and telnet functionality of Moxa EDR-810 V4.1 build 17030317. An attacker can look at network traffic to get the admin password for the device. The attacker can then use the credentials to login as admin.

Tested Versions

Moxa EDR-810 V4.1 build 17030317

Product URLs

<https://www.moxa.com/product/EDR-810.htm&gt;

CVSSv3 Score

5.7 - CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CWE

CWE 317 - Cleartext Transmission of Sensitive Information

Details

By default the device uses HTTP instead of HTTPS. Passwords are sent in clear text. An attacker can monitor network traffic for a password.

Exploit Proof-of-Concept

The following POST is sent with plain text credentials.

POST /init.asp HTTP/1.1
Host: 192.168.127.254
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://192.168.127.254/Login.asp
Cookie: NAME=admin; PASSWORD=d3bff8450106a52369b8b4dbca7b1b16; AUTHORITY=; 		sysnotify_support=yes; sysnotify_loginStatus=initial; lasttime=1509719511146; Auto-	Logout_Time=300000; sessionID=1707101564
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 50

Username=admin&Password=moxa&Submit.x=0&Submit.y=0

Timeline

2017-11-15 - Vendor Disclosure
2017-11-19 - Vendor Acknowledged
2017-12-25 - Vendor provided timeline for fix (Feb 2018)
2018-01-04 - Timeline pushed to mid-March per vendor
2018-03-24 - Talos follow up with vendor for release timeline
2018-03-26 - Timeline pushed to 4/13/18 per vendor
2018-04-12 - Vendor patched & published new firmware on website
2018-04-13 - Public Release