CVE-2019-5177 : Vulnerability Insights and Analysis
Learn about CVE-2019-5177, a critical stack buffer overflow vulnerability in WAGO PFC200 Firmware version 03.02.02(14) that can lead to a denial of service. Find mitigation steps and long-term security practices here.
A stack buffer overflow vulnerability in the 'I/O-Check' function of the iocheckd service in WAGO PFC200 Firmware version 03.02.02(14) allows attackers to crash the service by overflowing the destination buffer.
Understanding CVE-2019-5177
This CVE involves a critical vulnerability in the WAGO PFC200 device's firmware that can be exploited to cause a denial of service.
What is CVE-2019-5177?
The vulnerability stems from a stack buffer overflow in the iocheckd service's 'I/O-Check' function, triggered by exceeding the buffer's capacity with specific domainname values.
The Impact of CVE-2019-5177
Exploiting this vulnerability can lead to a denial of service by crashing the affected service, potentially disrupting critical operations relying on the WAGO PFC200 device.
Technical Details of CVE-2019-5177
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The vulnerability arises from a stack buffer overflow in the 'I/O-Check' function of the iocheckd service in WAGO PFC200 Firmware version 03.02.02(14), caused by exceeding the buffer's capacity with specific domainname values.
Affected Systems and Versions
- Product: WAGO PFC200
- Vendor: Wago
- Firmware Version: 03.02.02(14)
Exploitation Mechanism
- Attackers exploit the vulnerability by overflowing the destination buffer with specific domainname values, leading to a service crash.
Mitigation and Prevention
Protecting systems from CVE-2019-5177 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply patches or updates provided by the vendor to mitigate the vulnerability.
- Implement network segmentation to limit the impact of potential attacks.
Long-Term Security Practices
- Regularly monitor and update firmware to address known vulnerabilities.
- Conduct security assessments and penetration testing to identify and remediate weaknesses.
Patching and Updates
- Stay informed about security advisories and updates from Wago to apply patches promptly and enhance system security.