ZDI-21-1303: NETGEAR R6400v2 UPnP uuid Stack-based Buffer Overflow Remote Code Execution Vulnerability
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400v2 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UPnP service, which listens on TCP port 5000 by default. When parsing the uuid request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| NETGEAR R6400v2 firmware |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-21-1303?
ZDI-21-1303 has been rated as high severity due to its potential for remote code execution without authentication.
How do I fix ZDI-21-1303?
To remediate ZDI-21-1303, update the firmware of your NETGEAR R6400v2 router to the latest version provided by the vendor.
Who is affected by ZDI-21-1303?
ZDI-21-1303 specifically affects users of NETGEAR R6400v2 routers that have not implemented the necessary security updates.
Can ZDI-21-1303 be exploited remotely?
Yes, ZDI-21-1303 can be exploited by network-adjacent attackers to execute arbitrary code.
Is authentication required to exploit ZDI-21-1303?
No, ZDI-21-1303 can be exploited without the need for authentication.
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- collector/zdi-advisory
- source/ZDI
- alias/ZDI-21-1303
- alias/ZDI-CAN-14110
- alias/CVE-2021-34991
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
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- canonical/netgear r6400v2 firmware