CVE-2020-5735 Amcrest Cameras and Network Video Recorder (NVR): memory-safety flaw
In plain words: The program mishandles the memory it uses to keep track of data. A specially made input can scramble that memory. Usually lets an attacker crash the program or run their own code with its permissions.
Confirmed exploited by CISA on · US federal patch deadline May 3, 2022
What to do
- Install Amcrest's security update for Cameras and Network Video Recorder (NVR). If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic firmware updates and replace gear the maker no longer supports.
- Change default passwords and switch off remote administration and features you do not use.
- Do not put storage boxes or cameras directly on the internet — use the maker's app or a VPN.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Taken over in bulk to join botnets, used to watch your traffic, or — for storage boxes — locked by ransomware.
The details
- Official name
- Amcrest Cameras and NVR Stack-based Buffer Overflow Vulnerability
- Product
- Amcrest Cameras and Network Video Recorder (NVR)
- CISA description
- Amcrest cameras and NVR contain a stack-based buffer overflow vulnerability through port 37777 that allows an unauthenticated, remote attacker to crash the device and possibly execute code.
- Type of flaw
- Memory-safety flaw (CWE-121)
- Confirmed exploited
- Nov 3, 2021
- US federal patch deadline
- May 3, 2022
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Answering about CVE-2020-5735 ·
Questions about CVE-2020-5735
Is CVE-2020-5735 being exploited?
Yes. CISA added CVE-2020-5735 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2020-5735?
Install Amcrest's security update for Cameras and Network Video Recorder (NVR). If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic firmware updates and replace gear the maker no longer supports.
Am I affected by CVE-2020-5735?
Only if you use Amcrest Cameras and Network Video Recorder (NVR). This one is aimed at devices or apps of the kind people own.