Advisory Details

February 25th, 2021

(Pwn2Own) NETGEAR Nighthawk R7800 Use of Hard-coded Password Authentication Bypass Vulnerability

ZDI-21-252
ZDI-CAN-12287

CVE ID CVE-2021-27254
CVSS SCORE 6.3, (AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
AFFECTED VENDORS NETGEAR
AFFECTED PRODUCTS R7800
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7800. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the apply_save.cgi endpoint. This issue results from the use of hard-coded encryption key. An attacker can leverage this vulnerability 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
  • 2020-11-06 - Vulnerability reported to vendor
  • 2021-02-25 - Coordinated public release of advisory
CREDIT 84c0
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