CVE-2018-11452 Denial of service in Firmware variant DNP3 TCP for EN100 Ethernet module
Remote attackers can cause a denial-of-service condition in Siemens EN100 modules by sending crafted packets when IEC 61850-MMS is active.
- 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-2018-11452?
CVE-2018-11452 is a high-severity denial of service vulnerability in Siemens AG Firmware variant DNP3 TCP for EN100 Ethernet module, published on 23 Jul 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 Firmware variant IEC 61850 for EN100 Ethernet module (All versions < V4.33), Firmware variant PROFINET IO for EN100 Ethernet module (All versions), Firmware variant Modbus TCP for EN100 Ethernet module (All versions), Firmware variant DNP3 TCP for EN100 Ethernet module (All versions), Firmware variant IEC104 for EN100 Ethernet module (All versions < V1.22). Specially crafted packets to port 102/tcp could cause a denial-of-service condition in the EN100 communication module if oscillographs are running. A manual restart is required to recover the EN100 module functionality. Successful exploitation requires an attacker with network access to send multiple packets to the EN100 module. As a precondition the IEC 61850-MMS communication needs to be activated on the affected EN100 modules. No user interaction or privileges are required to exploit the security vulnerability. The vulnerability could allow causing a Denial-of-Service condition of the network functionality of the device, compromising the availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known.
Weakness: CWE-20
Which versions are affected by CVE-2018-11452?
It affects 8 products.
Products include Siemens Cp100 Firmware, Siemens Cp200 Firmware, Siemens Cp300 Firmware, Siemens Dnp3 Tcp Firmware, Siemens Iec104 Firmware, Siemens Iec 61850 Firmware and 2 more.
How do I fix CVE-2018-11452?
No fix has been published for CVE-2018-11452 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2018-11452 being exploited?
There is no known exploitation of CVE-2018-11452 in the wild and no public exploit code.
Other vulnerabilities in Siemens AG Firmware variant DNP3 TCP for EN100 Ethernet module
Sources
Also known as GHSA-x2m8-3rfj-36v4.