CVE-2017-1000230 : What You Need to Know
Learn about CVE-2017-1000230 affecting Snap7 Server version 1.4.1. Discover the impact, technical details, and mitigation steps for this denial of service vulnerability.
Snap7 Server version 1.4.1 is susceptible to a denial of service attack due to unexpected input in the ItemCount field of the ReadVar or WriteVar functions in the S7 protocol implementation.
Understanding CVE-2017-1000230
An overview of the vulnerability and its impact.
What is CVE-2017-1000230?
The vulnerability in Snap7 Server version 1.4.1 can be exploited by providing unexpected input to the ItemCount field of the ReadVar or WriteVar functions in the S7 protocol implementation, leading to a denial of service attack.
The Impact of CVE-2017-1000230
The vulnerability can cause the Snap7 Server version 1.4.1 to crash, potentially disrupting operations and services relying on the affected server.
Technical Details of CVE-2017-1000230
Insights into the vulnerability specifics.
Vulnerability Description
An unexpected input in the ItemCount field of the ReadVar or WriteVar functions in the S7 protocol implementation of Snap7 can trigger a denial of service attack, resulting in the crash of Snap7 Server version 1.4.1.
Affected Systems and Versions
- Snap7 Server version 1.4.1
Exploitation Mechanism
The vulnerability is exploited by providing unexpected input to the ItemCount field of the ReadVar or WriteVar functions in the S7 protocol implementation of Snap7.
Mitigation and Prevention
Measures to address and prevent the vulnerability.
Immediate Steps to Take
- Update Snap7 Server to a patched version if available
- Implement network segmentation to limit exposure
Long-Term Security Practices
- Regularly update and patch software and systems
- Conduct security assessments and audits periodically
Patching and Updates
- Check for security advisories and updates from Snap7