Moxa EDR-810 Plaintext Password Storage Vulnerability(CVE-2017-12127)

Summary

An password storage vulnerability exists in the operating system functionality of Moxa EDR-810 V4.1 build 17030317. An attacker with shell access could extract passwords in clear text from the device.

Tested Versions

Moxa EDR-810 V4.1 build 17030317

Product URLs

https://www.moxa.com/product/EDR-810.htm

CVSSv3 Score

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

CWE

CWE-256 - Plaintext Storage of a Password

Details

The device stores credentials in plaintext in /magicP/cfg4.0/cfg_file/USER_ACCOUNT.CFG. This file mirrors the contents of /etc/shadow, except all the passwords are in plaintext.

Exploit Proof-of-Concept

cat /magicP/cfg4.0/cfg_file/USER_ACCOUNT.CFG

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