CVE-2020-5736 Explained : Impact and Mitigation

Amcrest cameras and NVR are vulnerable to a null pointer dereference over port 37777, potentially allowing an authenticated remote attacker to crash the device.

Understanding CVE-2020-5736

Amcrest cameras and NVR devices are susceptible to a specific vulnerability that could be exploited by remote attackers.

What is CVE-2020-5736?

CVE-2020-5736 refers to a vulnerability in Amcrest cameras and NVR systems that could lead to a null pointer dereference when accessed over port 37777. This flaw can be abused by authenticated remote attackers to cause a device crash.

The Impact of CVE-2020-5736

The vulnerability poses a risk of device crashes, potentially disrupting surveillance operations and compromising security.

Technical Details of CVE-2020-5736

Amcrest cameras and NVR systems are affected by a specific security issue.

Vulnerability Description

The vulnerability in Amcrest cameras and NVR systems allows for a null pointer dereference over port 37777, enabling authenticated remote attackers to crash the device.

Affected Systems and Versions

Product: Amcrest
Vulnerable Versions:
before 2.623.00AC004.0.R.200316
2.420.AC00.18.R.20200217
2.800.00AC000.0.R.200330
2.800.0000000.6.R.200314.bin
2.622.00AC000.0.R.200320.bin
and 4.000.00AC000.0.R.200218

Exploitation Mechanism

The vulnerability can be exploited by authenticated remote attackers over port 37777 to trigger a null pointer dereference, leading to a device crash.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2020-5736.

Immediate Steps to Take

Apply security patches provided by Amcrest promptly.
Restrict network access to vulnerable devices.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and software to mitigate known vulnerabilities.
Implement strong authentication mechanisms to prevent unauthorized access.

Patching and Updates

Stay informed about security advisories from Amcrest.
Apply patches and updates as soon as they are released to protect against potential exploits.