CVE-2019-9677 : Vulnerability Insights and Analysis
Learn about CVE-2019-9677 affecting Dahua products. Discover the impact, affected systems, exploitation risks, and mitigation steps for this buffer overflow vulnerability.
Certain Dahua products are vulnerable to buffer overflow attacks due to insufficient verification of their CGI interfaces. This vulnerability affects specific versions built before August 18, 2019.
Understanding CVE-2019-9677
What is CVE-2019-9677?
Certain Dahua products have not undergone thorough verification of their CGI interfaces, making them vulnerable to buffer overflow attacks through the manipulation of malicious packets.
The Impact of CVE-2019-9677
This vulnerability allows attackers to exploit buffer overflow, potentially leading to unauthorized access, data manipulation, or system crashes on affected devices.
Technical Details of CVE-2019-9677
Vulnerability Description
The specific fields of CGI interfaces in Dahua products are not strictly verified, enabling attackers to trigger buffer overflows by crafting malicious packets.
Affected Systems and Versions
- Affected Products: IPC-HDW1X2X, IPC-HFW1X2X, IPC-HDW2X2X, IPC-HFW2X2X, IPC-HDW4X2X, IPC-HFW4X2X, IPC-HDBW4X2X, IPC-HDW5X2X, IPC-HFW5X2X
- Vulnerable Versions: Versions built before August 18, 2019
Exploitation Mechanism
Attackers can exploit this vulnerability by sending specially crafted packets to the affected Dahua devices, causing buffer overflows and potentially executing malicious code.
Mitigation and Prevention
Immediate Steps to Take
- Implement network segmentation to isolate vulnerable devices
- Apply firewall rules to restrict access to affected products
- Monitor network traffic for any suspicious activities
Long-Term Security Practices
- Regularly update firmware to patch known vulnerabilities
- Conduct security assessments and penetration testing on IoT devices
Patching and Updates
- Check Dahua's official website for firmware updates addressing CVE-2019-9677