CVE-2018-4840 Missing authorization in DIGSI 4
Unauthenticated remote attackers can upload modified device configurations to overwrite access authorization passwords in Siemens industrial automation products.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-4840?
CVE-2018-4840 is a high-severity missing authorization vulnerability in Siemens DIGSI 4, published on 8 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been identified in DIGSI 4 (All versions < V4.92), EN100 Ethernet module DNP3 variant (All versions < V1.05.00), EN100 Ethernet module IEC 104 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module PROFINET IO variant (All versions). The device engineering mechanism allows an unauthenticated remote user to upload a modified device configuration overwriting access authorization passwords.
Weakness: CWE-306
Which versions are affected by CVE-2018-4840?
It affects 9 products.
Products include Siemens Digsi 4, Siemens En100 Ethernet Module Dnp3 Firmware, Siemens En100 Ethernet Module Iec 104 Firmware, Siemens En100 Ethernet Module Iec 61850 Firmware, Siemens En100 Ethernet Module Modbus Tcp Firmware, Siemens En100 Ethernet Module Profinet Io Firmware and 3 more.
How do I fix CVE-2018-4840?
No fix has been published for CVE-2018-4840 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2018-4840 being exploited?
There is no known exploitation of CVE-2018-4840 in the wild and no public exploit code.
Other vulnerabilities in Siemens DIGSI 4
Sources
Also known as GHSA-2fqf-9j8p-6mg2.