CVE-2021-27255 Missing authorization in R7800
Remote attackers can execute arbitrary code as root on NETGEAR R7800 routers due to missing authentication on a specific endpoint.
- 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-2021-27255?
CVE-2021-27255 is a medium-severity missing authorization 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 remote attackers to execute arbitrary code 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 refresh_status.aspx endpoint. The issue results from a lack of authentication required to start a service on the server. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12360.
Weakness: CWE-306
Which versions are affected by CVE-2021-27255?
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-2021-27255?
No fix has been published for CVE-2021-27255 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-27255 being exploited?
There is no known exploitation of CVE-2021-27255 in the wild and no public exploit code.
Other vulnerabilities in Netgear D7800 Firmware
Sources
Also known as GHSA-h584-8p47-255w.