cyfenced.com →

[ CVE-2017-5521 · Published 17 Jan 2017 ]

NETGEAR Multiple Devices Exposure of Sensitive Information Vulnerability

Exploited · CISA KEV CVSS 8.1 EPSS 89%No fix listed yet

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-09-08
  • EPSS: 89% chance of exploitation in the next 30 days (higher than 100% of CVEs)

[ Description ]Official description

An issue was discovered on NETGEAR R8500, R8300, R7000, R6400, R7300, R7100LG, R6300v2, WNDR3400v3, WNR3500Lv2, R6250, R6700, R6900, and R8000 devices. They are prone to password disclosure via simple crafted requests to the web management server. The bug is exploitable remotely if the remote management option is set, and can also be exploited given access to the router over LAN or WLAN. When trying to access the web panel, a user is asked to authenticate; if the authentication is canceled and password recovery is not enabled, the user is redirected to a page that exposes a password recovery token. If a user supplies the correct token to the page /passwordrecovered.cgi?id=TOKEN (and password recovery is not enabled), they will receive the admin password for the router. If password recovery is set the exploit will fail, as it will ask the user for the recovery questions that were previously set when enabling that feature. This is persistent (even after disabling the recovery option, the exploit will fail) because the router will ask for the security questions.

CISA: Multiple NETGEAR devices are prone to admin password disclosure via simple crafted requests to the web management server.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 29 Sep 2022): Apply updates per vendor instructions. If the affected device has since entered end-of-life, it should be disconnected if still in use.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References