Moxa EDR-810 Cleartext Transmission of Password Vulnerability(CVE-2017-12123)

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

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