ZDI-CAN-9643: (0Day) (Pwn2Own) NETGEAR R6700 UPnP NewBlockSiteName Stack-based Buffer Overflow Remote Code Execution Vulnerability
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6700 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the UPnP service, which listens on TCP port 5000 by default. The issue results from the lack of proper validation of 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 R6700v1 firmware |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-CAN-9643?
The severity of ZDI-CAN-9643 is rated as high due to its potential to allow unauthorized access to the NETGEAR R6700 router.
How do I fix ZDI-CAN-9643?
To fix ZDI-CAN-9643, update your NETGEAR R6700 router to the latest firmware version provided by NETGEAR.
Who is affected by ZDI-CAN-9643?
Users of NETGEAR R6700 routers with vulnerable firmware versions are affected by ZDI-CAN-9643.
What type of attacks can exploit ZDI-CAN-9643?
ZDI-CAN-9643 can be exploited by network-adjacent attackers to bypass authentication mechanisms.
Is there a workaround for ZDI-CAN-9643?
Currently, the best workaround for ZDI-CAN-9643 is to ensure your router is updated to the latest firmware as there is no described alternative mitigation.
- agent/severity
- agent/references
- agent/title
- agent/softwarecombine
- agent/tags
- collector/zdi-advisory
- alias/ZDI-20-704
- alias/ZDI-CAN-9643
- alias/CVE-2020-10924
- agent/software-canonical-lookup-request
- agent/event
- agent/type
- agent/description
- vendor/netgear
- canonical/netgear r6700v1 firmware