ZDI-21-071: NETGEAR R7450 Password Recovery External Control of Critical State Data Authentication Bypass Vulnerability
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7450 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from improper state tracking in the password recovery process. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| NETGEAR R7450 firmware |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of ZDI-21-071?
The severity of ZDI-21-071 is considered high due to the ability for network-adjacent attackers to bypass authentication.
How do I fix ZDI-21-071?
To fix ZDI-21-071, update your NETGEAR R7450 router firmware to the latest version provided by NETGEAR.
Who is affected by ZDI-21-071?
Any installations of NETGEAR R7450 routers are affected by ZDI-21-071.
What type of vulnerability is ZDI-21-071?
ZDI-21-071 is an authentication bypass vulnerability in the mini_httpd service.
Can ZDI-21-071 be exploited remotely?
No, ZDI-21-071 requires network adjacency to exploit, meaning the attacker must be on the same local network.
- agent/references
- agent/type
- agent/softwarecombine
- agent/title
- agent/severity
- agent/description
- agent/source
- agent/tags
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-21-071
- alias/ZDI-CAN-11365
- alias/CVE-2020-27872
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- agent/event
- vendor/netgear
- canonical/netgear r7450 firmware