Vulnerability Description
NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13055.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Netgear | D7800 Firmware | < 1.0.1.64 |
| Netgear | D7800 | - |
| Netgear | Ex2700 Firmware | < 1.0.1.66 |
| Netgear | Ex2700 | - |
| Netgear | Ex6100 Firmware | < 1.0.1.106 |
| Netgear | Ex6100 | v2 |
| Netgear | Ex6150 Firmware | < 1.0.1.106 |
| Netgear | Ex6150 | v2 |
| Netgear | Ex6200 Firmware | < 1.0.1.86 |
| Netgear | Ex6200 | v2 |
| Netgear | Ex6250 Firmware | < 1.0.0.146 |
| Netgear | Ex6250 | - |
| Netgear | Ex6400 Firmware | < 1.0.2.164 |
| Netgear | Ex6400 | - |
| Netgear | Ex6400V2 Firmware | < 1.0.0.146 |
| Netgear | Ex6400V2 | - |
| Netgear | Ex6410 Firmware | < 1.0.0.146 |
| Netgear | Ex6410 | - |
| Netgear | Ex6420 Firmware | < 1.0.0.146 |
| Netgear | Ex6420 | - |
Related Weaknesses (CWE)
References
- https://kb.netgear.com/000064044/Security-Advisory-for-Pre-Authentication-BufferThird Party Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-1116/Third Party Advisory
- https://kb.netgear.com/000064044/Security-Advisory-for-Pre-Authentication-BufferThird Party Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-1116/Third Party Advisory
FAQ
What is CVE-2021-34947?
CVE-2021-34947 is a vulnerability with a CVSS score of 8.8 (HIGH). NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800...
How severe is CVE-2021-34947?
CVE-2021-34947 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-34947?
Check the references section above for vendor advisories and patch information. Affected products include: Netgear D7800 Firmware, Netgear D7800, Netgear Ex2700 Firmware, Netgear Ex2700, Netgear Ex6100 Firmware.