CVE-2024-39947 Denial of service in NVR4XXX

Medium 6.5 Published 31 Jul 2024 Updated 27 Oct 2024

An authenticated attacker can crash Dahua NVR devices by sending crafted data packets to a vulnerable interface.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2024-39947?

CVE-2024-39947 is a medium-severity denial of service vulnerability in Dahua NVR4XXX, published on 31 Jul 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability has been found in Dahua products.After obtaining the ordinary user's username and password, the attacker can send a carefully crafted data packet to the interface with vulnerabilities, causing the device to crash.

Which versions are affected by CVE-2024-39947?

It affects 56 products.

Products include Dahuasecurity Nvr4104-4ks2\/L Firmware, Dahuasecurity Nvr4104-4ks3 Firmware, Dahuasecurity Nvr4104-P-4ks2\/L Firmware, Dahuasecurity Nvr4104-P-4ks3\(960g\) Firmware, Dahuasecurity Nvr4104-P-4ks3 Firmware, Dahuasecurity Nvr4104hs-4ks2\/L Firmware and 50 more.

How do I fix CVE-2024-39947?

No fix has been published for CVE-2024-39947 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-39947 being exploited?

There is no known exploitation of CVE-2024-39947 in the wild and no public exploit code.

Sources

Also known as GHSA-mj68-5w84-cr6g.