CVE-2017-5521

Known Exploited Public Exploit

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.

8.1

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 94.17% Top 5%

KEV Since

Vendor Advisory netgear.com

Affected: n/a n/a

References

Link	Tags
https://www.exploit-db.com/exploits/41205/	exploit vdb entry third party advisory
http://kb.netgear.com/30632/Web-GUI-Password-Recovery-and-Exposure-Security-Vulnerability	vendor advisory
http://www.securityfocus.com/bid/95457	vdb entry third party advisory broken link

Frequently Asked Questions

What is the severity of CVE-2017-5521?: CVE-2017-5521 has been scored as a high severity vulnerability.
How to fix CVE-2017-5521?: To fix CVE-2017-5521, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-5521 being actively exploited in the wild?: It is confirmed that CVE-2017-5521 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~94% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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