ENDRESS+HAUSER: Ecograph T utilizing Webserver firmware version 1.x

User sessions are not closed correctly and a user can gain higher privileges than he should have.

VDE-2020-021 (2020-11-19 15:48 UTC+0100)

CVE Identifier

CVE-2020-12495

Severity

9.1 (CVSS:3.0:AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H)

Affected Vendors

Endress+Hauser

Affected Products

RSG35	Ecograph T	Firmware versions >= V1.0.0 (07/2013) < V2.0.0 (08/2015)
ORSG35	Ecograph T Neutral/Private Label	Firmware versions >= V1.0.0 (07/2013) < V2.0.0 (08/2015)

Vulnerability Type

Improper Privilege Management (CWE-269)

Summary

The affected device has a web-based user interface with a role-based access system. Users with different roles have different write and read privileges. The access system is based on dynamic "tokens".

Impact

The vulnerability is that user sessions are not closed correctly and a user with fewer rights is assigned the higher rights when he logs on.

Solution

Customers should configure a perimeter firewall to block traffic from untrusted networks and users to the device. These recommendations will be incorporated into the device documentation (operating instructions).

Change default password for operator, service and admin account.

Endress+Hauser will not change this behavior.
Customers are recommended to take the measures for Temporary Fix / Mitigation as described above.

Reported by

Maxim Rupp reported to CERT@VDE