high8.8
CVE-2021-34991
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400v2 1.0.4.106_10.0.80 routers.
Impact
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400v2 1.0.4.106_10.0.80 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. Was ZDI-CAN-14110.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Netgear | Ex3700 Firmware | before 1.0.0.94 |
| Netgear | Ex3800 Firmware | before 1.0.0.94 |
| Netgear | Ex6120 Firmware | before 1.0.0.66 |
| Netgear | Ex6130 Firmware | before 1.0.0.66 |
| Netgear | R6400 Firmware | before 1.0.1.76 |
| Netgear | R6400v2 Firmware | before 1.0.4.120 |
| Netgear | R6700v3 Firmware | before 1.0.4.120 |
| Netgear | R6900p Firmware | before 1.3.3.142 |
| Netgear | R7000 Firmware | before 1.0.11.128 |
| Netgear | R7000p Firmware | before 1.3.3.142 |
| Netgear | R7100lg Firmware | before 1.0.0.72 |
| Netgear | R7850 Firmware | before 1.0.5.76 |
Weakness classification
References
- NVD record
- CVE.org record
- https://kb.netgear.com/000064361/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Multiple-Products-PSV-2021-0168
- https://www.zerodayinitiative.com/advisories/ZDI-21-1303/
- https://kb.netgear.com/000064361/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Multiple-Products-PSV-2021-0168
- https://www.zerodayinitiative.com/advisories/ZDI-21-1303/