CVE-2018-16563 Denial of service in Firmware variant DNP3 TCP for EN100 Ethernet module
Remote attackers can cause a denial-of-service condition in Siemens SIPROTEC relays by sending crafted packets, requiring a manual restart to recover.
- 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-2018-16563?
CVE-2018-16563 is a medium-severity denial of service vulnerability in Siemens Firmware variant DNP3 TCP for EN100 Ethernet module, published on 21 Mar 2019. 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 < V4.35), 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), Firmware variant Profinet IO for EN100 Ethernet module (All versions), SIPROTEC 5 relays with CPU variants CP300 and CP100 and the respective Ethernet communication modules (All versions < V7.82), SIPROTEC 5 relays with CPU variants CP200 and the respective Ethernet communication modules (All versions < V7.58). Specially crafted packets to port 102/tcp could cause a denial-of-service condition in the affected products. A manual restart is required to recover the EN100 module functionality of the affected devices. Successful exploitation requires an attacker with network access to send multiple packets to the affected products or modules. As a precondition the IEC 61850-MMS communication needs to be activated on the affected products or modules. No user interaction or privileges are required to exploit the 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.
Which versions are affected by CVE-2018-16563?
It affects 9 products.
Products include Siemens En100 Ethernet Module Firmware, Siemens En100 Ethernet Module With Firmware Variant Dnp3 Tcp, Siemens En100 Ethernet Module With Firmware Variant Iec104, Siemens En100 Ethernet Module With Firmware Variant Iec 61850, Siemens En100 Ethernet Module With Firmware Variant Modbus Tcp, Siemens En100 Ethernet Module With Firmware Variant Profinet Io and 3 more.
How do I fix CVE-2018-16563?
No fix has been published for CVE-2018-16563 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-2018-16563 being exploited?
There is no known exploitation of CVE-2018-16563 in the wild and no public exploit code.
Other vulnerabilities in Siemens Firmware variant DNP3 TCP for EN100 Ethernet module
Sources
Also known as GHSA-72c7-gmhw-rgxw.