Advisory Details

October 29th, 2021

NETGEAR Multiple Routers httpd Missing Authentication for Critical Function Information Disclosure Vulnerability

ZDI-21-1275
ZDI-CAN-13708

CVE ID CVE-2021-34983
CVSS SCORE 6.5, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AFFECTED VENDORS NETGEAR
AFFECTED PRODUCTS Multiple Routers
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of authentication prior to allowing access to system configuration information. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise.

ADDITIONAL DETAILS NETGEAR has issued an update to correct this vulnerability. More details can be found at:
https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and-DSL-Modem-Routers-PSV-2021-0159
DISCLOSURE TIMELINE
  • 2021-06-30 - Vulnerability reported to vendor
  • 2021-10-29 - Coordinated public release of advisory
CREDIT Sungur Labs
BACK TO ADVISORIES