Advisory Details

February 26th, 2021

(Pwn2Own) NETGEAR R7800 ready-genie-cloud Improper Certificate Validation Remote Code Execution Vulnerability

ZDI-21-264
ZDI-CAN-12362

CVE ID CVE-2021-27257
CVSS SCORE 6.5, (AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
AFFECTED VENDORS NETGEAR
AFFECTED PRODUCTS R7800
VULNERABILITY DETAILS


This vulnerability allows network-adjacent attackers to compromise the integrity of downloaded information on affected installations of NETGEAR R7800. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the downloading of files via FTP. The issue results from the lack of proper validation of the certificate presented by the server. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root.

ADDITIONAL DETAILS NETGEAR has issued an update to correct this vulnerability. More details can be found at:
https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders
DISCLOSURE TIMELINE
  • 2020-12-31 - Vulnerability reported to vendor
  • 2021-02-26 - Coordinated public release of advisory
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