CVE-2021-27257 Other in R7800
Network-adjacent attackers can compromise downloaded file integrity via improper certificate validation in FTP, potentially leading to root code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-27257?
CVE-2021-27257 is a medium-severity vulnerability in Netgear D7800 Firmware, published on 5 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
This vulnerability allows network-adjacent attackers to compromise the integrity of downloaded information on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Authentication is not required to exploit this vulnerability. The specific flaw exists within the downloading of files via FTP. The issue results from the lack of proper validation of the certificate presented by the server. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-12362.
Weakness: CWE-295
Which versions are affected by CVE-2021-27257?
It affects 43 products.
Products include Netgear Br200 Firmware, Netgear Br500 Firmware, Netgear D7800 Firmware, Netgear Ex6100v2 Firmware, Netgear Ex6150v2 Firmware, Netgear Ex6250 Firmware and 37 more.
How do I fix CVE-2021-27257?
No fix has been published for CVE-2021-27257 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-27257 being exploited?
There is no known exploitation of CVE-2021-27257 in the wild and no public exploit code.
Other vulnerabilities in Netgear D7800 Firmware
Sources
Also known as GHSA-q57h-78h9-m59j.