Vulnerability Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. When parsing the funjsq_access_token parameter, the process does not properly validate 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-11653.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Netgear | Ac2100 Firmware | < 1.2.0.76 |
| Netgear | Ac2100 | - |
| Netgear | Ac2400 Firmware | < 1.2.0.76 |
| Netgear | Ac2400 | - |
| Netgear | Ac2600 Firmware | < 1.2.0.76 |
| Netgear | Ac2600 | - |
| Netgear | R6700 Firmware | < 1.2.0.76 |
| Netgear | R6700 | v2 |
| Netgear | R6800 Firmware | < 1.2.0.76 |
| Netgear | R6800 | - |
| Netgear | R6900 Firmware | < 1.2.0.76 |
| Netgear | R6900 | v2 |
| Netgear | R7200 Firmware | < 1.2.0.76 |
| Netgear | R7200 | - |
| Netgear | R7350 Firmware | < 1.2.0.76 |
| Netgear | R7350 | - |
| Netgear | R7400 Firmware | < 1.2.0.76 |
| Netgear | R7400 | - |
| Netgear | R7450 Firmware | < 1.2.0.76 |
| Netgear | R7450 | - |
Related Weaknesses (CWE)
References
- https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-VulneraVendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-1423/Third Party AdvisoryVDB Entry
- https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-VulneraVendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-1423/Third Party AdvisoryVDB Entry
FAQ
What is CVE-2020-27867?
CVE-2020-27867 is a vulnerability with a CVSS score of 6.8 (MEDIUM). This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020,...
How severe is CVE-2020-27867?
CVE-2020-27867 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-27867?
Check the references section above for vendor advisories and patch information. Affected products include: Netgear Ac2100 Firmware, Netgear Ac2100, Netgear Ac2400 Firmware, Netgear Ac2400, Netgear Ac2600 Firmware.