CVE-2018-4027 Denial of service in Novatek

Medium 5.3 Published 13 May 2019 Updated 5 Aug 2024

A specially crafted packet causes a semaphore deadlock in the dashcam firmware, preventing the device from receiving inputs.

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

What is CVE-2018-4027?

CVE-2018-4027 is a medium-severity denial of service vulnerability in Novatek, published on 13 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An exploitable denial-of-service vulnerability exists in the XML_UploadFile Wi-Fi command of the NT9665X Chipset firmware, running on the Anker Roav A1 Dashcam, version RoavA1SWV1.9. A specially crafted packet can cause a semaphore deadlock, which prevents the device from receiving any physical or network inputs. An attacker can send a specially crafted packet to trigger this vulnerability.

Weakness: CWE-662

Which versions are affected by CVE-2018-4027?

It affects 1 product.

Products include Anker-in Roav Dashcam A1 Firmware.

How do I fix CVE-2018-4027?

No fix has been published for CVE-2018-4027 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-2018-4027 being exploited?

There is no known exploitation of CVE-2018-4027 in the wild and no public exploit code.

Sources

Also known as GHSA-vfv6-gcfm-5fx2.