Vulnerability Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the vendor_specific DHCP opcode. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12216.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Netgear | Br200 Firmware | < 5.10.0.5 |
| Netgear | Br200 | - |
| Netgear | Br500 Firmware | < 5.10.0.5 |
| Netgear | Br500 | - |
| Netgear | D7800 Firmware | < 1.0.1.60 |
| Netgear | D7800 | - |
| Netgear | Ex6100V2 Firmware | < 1.0.1.98 |
| Netgear | Ex6100 | v2 |
| Netgear | Ex6150 Firmware | < 1.0.1.98 |
| Netgear | Ex6150 | v2 |
| Netgear | Ex6250 Firmware | < 1.0.0.134 |
| Netgear | Ex6250 | - |
| Netgear | Ex6400 Firmware | < 1.0.2.158 |
| Netgear | Ex6400 | - |
| Netgear | Ex6400V2 Firmware | < 1.0.0.134 |
| Netgear | Ex6410 Firmware | < 1.0.0.134 |
| Netgear | Ex6410 | - |
| Netgear | Ex6420 Firmware | < 1.0.0.134 |
| Netgear | Ex6420 | - |
| Netgear | Ex7300 Firmware | < 1.0.2.158 |
Related Weaknesses (CWE)
References
- https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-PatchVendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-248/Third Party AdvisoryVDB Entry
- https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-PatchVendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-248/Third Party AdvisoryVDB Entry
FAQ
What is CVE-2021-27252?
CVE-2021-27252 is a vulnerability with a CVSS score of 8.8 (HIGH). This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Authentication is not required to exploit this vuln...
How severe is CVE-2021-27252?
CVE-2021-27252 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-2021-27252?
Check the references section above for vendor advisories and patch information. Affected products include: Netgear Br200 Firmware, Netgear Br200, Netgear Br500 Firmware, Netgear Br500, Netgear D7800 Firmware.