CVE-2018-16561: Input Validation
First published: Wed Apr 17 2019(Updated: )
A vulnerability has been identified in SIMATIC S7-300 CPUs (All versions < V3.X.16). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart. Successful exploitation requires an attacker to be able to send a specially crafted S7 communication packet to a communication interface of the CPU. This includes Ethernet, PROFIBUS, and Multi Point Interfaces (MPI). No user interaction or privileges are required to exploit the security vulnerability. The vulnerability could allow causing a Denial-of-Service condition of the core functionality of the CPU, compromising the availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known. Siemens confirms the security vulnerability and provides mitigations to resolve the security issue.
Credit: productcert@siemens.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Siemens Simatic S7-300 Firmware | ||
| Siemens Simatic S7-300 | ||
| Siemens Simatic S7-300f Firmware | ||
| Siemens Simatic S7-300f | ||
| Siemens Simatic S7-300fs Firmware | ||
| Siemens Simatic S7-300fs | ||
| Siemens Simatic S7-300t Firmware | ||
| Siemens Simatic S7-300t |
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Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2018-16561.
What is the severity of CVE-2018-16561?
The severity of CVE-2018-16561 is high with a severity value of 7.5.
What is the affected software for CVE-2018-16561?
The affected software for CVE-2018-16561 is Siemens Simatic S7-300 CPUs (All versions < V3.X.16).
What is the impact of CVE-2018-16561?
CVE-2018-16561 could cause a Denial-of-Service condition on the affected CPU, which will remain in DEFECT mode until manually restarted.
How can CVE-2018-16561 be exploited?
Successful exploitation of CVE-2018-16561 requires an attacker to send specially crafted S7 communication packets to the affected CPU.
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- agent/last-modified-date
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- vendor/siemens
- canonical/siemens simatic s7-300 firmware
- canonical/siemens simatic s7-300
- canonical/siemens simatic s7-300f firmware
- canonical/siemens simatic s7-300f
- canonical/siemens simatic s7-300fs firmware
- canonical/siemens simatic s7-300fs
- canonical/siemens simatic s7-300t firmware
- canonical/siemens simatic s7-300t