CVE-2020-9500 : What You Need to Know

Dahua products are susceptible to Denial of Service vulnerabilities, potentially leading to device disruption.

Understanding CVE-2020-9500

What is CVE-2020-9500?

This CVE identifies Denial of Service vulnerabilities in certain Dahua products, triggered by a specific log query command after a successful login.

The Impact of CVE-2020-9500

Exploitation of this vulnerability can result in the affected device becoming unresponsive or crashing, disrupting normal operations.

Technical Details of CVE-2020-9500

Vulnerability Description

The vulnerability allows attackers to send a specific log query command post successful login, causing the device to crash or become unresponsive.

Affected Systems and Versions

Affected Dahua products include IPC-HX2XXX Series, IPC-HXXX5X4X Series, IPC-HX5842H, IPC-HX7842H, NVR 5x Series, NVR 4x Series, SD6AL Series, SD5A Series, SD1A Series, PTZ1A Series, and SD50/52C Series.
Vulnerable versions are those built before December 2019.

Exploitation Mechanism

The attacker needs to log in with a legal account and then send a specific log query command to trigger the vulnerability.

Mitigation and Prevention

Immediate Steps to Take

Implement network segmentation to isolate vulnerable devices.
Monitor network traffic for any suspicious activity.
Apply the latest security patches and updates from Dahua.

Long-Term Security Practices

Regularly update firmware and software to mitigate known vulnerabilities.
Conduct security assessments and penetration testing to identify and address weaknesses.

Patching and Updates

Dahua may release patches or updates to address this vulnerability. Stay informed through official channels for patch availability and apply them promptly.