Vulnerability CVE-2018-4838
Published: 2018-03-08

Description:
A vulnerability has been identified in EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module DNP3 variant (All versions < V1.04), EN100 Ethernet module PROFINET IO variant (All versions), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module IEC 104 variant (All versions < V1.22). The web interface (TCP/80) of affected devices allows an unauthenticated user to upgrade or downgrade the firmware of the device, including to older versions with known vulnerabilities.

Type:

CWE-306

 (Missing Authentication for Critical Function)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Siemens -> En100 ethernet module dnp3 firmware 
Siemens -> En100 ethernet module iec 104 firmware 
Siemens -> En100 ethernet module modbus tcp firmware 
Siemens -> En100 ethernet module profinet io firmware 

 References:
https://cert-portal.siemens.com/productcert/pdf/ssa-845879.pdf
https://ics-cert.us-cert.gov/advisories/ICSA-18-067-01
https://www.securityfocus.com/bid/103379
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