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.
Published 2017-01-17 09:59:00
Updated 2017-09-01 01:29:36
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Information leak

CVE-2017-5521 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
NETGEAR Multiple Devices Exposure of Sensitive Information Vulnerability
CISA required action:
Apply updates per vendor instructions. If the affected device has since entered end-of-life, it should be disconnected if still in use.
CISA description:
Multiple NETGEAR devices are prone to admin password disclosure via simple crafted requests to the web management server.
Notes:
https://kb.netgear.com/30632/Web-GUI-Password-Recovery-and-Exposure-Security-Vulnerability
Added on 2022-09-08 Action due date 2022-09-29

Exploit prediction scoring system (EPSS) score for CVE-2017-5521

97.31%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 100 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2017-5521

  • NETGEAR Administrator Password Disclosure
    First seen: 2020-04-26
    auxiliary/gather/netgear_password_disclosure
    This module will collect the password for the `admin` user. The exploit will not complete if password recovery is set on the router. The password is received by passing the token generated from `unauth.cgi` to `passwordrecovered.cgi`. This exploit works on many diffe

CVSS scores for CVE-2017-5521

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
MEDIUM AV:N/AC:M/Au:N/C:P/I:N/A:N
8.6
2.9
NIST
8.1
HIGH CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
2.2
5.9
NIST

CWE ids for CVE-2017-5521

References for CVE-2017-5521

Products affected by CVE-2017-5521

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