Advisory Details

This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of NETGEAR AC1200 Smart WiFi Router. User interaction is required to exploit this vulnerability.

The specific flaw exists within the handling of admin credentials provided to the mini_httpd endpoint. The issue results from displaying sensitive information in plaintext. An attacker can leverage this vulnerability to disclose sensitive information in the context of the administrator.

This vulnerability is being disclosed publicly without a patch in accordance with ZDI policies.

06/27/19 – ZDI reported the vulnerability to the vendor
06/27/19 – The vendor acknowledged
10/08/19 – ZDI requested a new update
10/10/19 – ZDI asked if a fix for a similar case included the fix for this one
10/11/19 – The vendor indicated the fix was not included
10/17/19 – ZDI requested an ETA for resolution and remarked the case was due in 10 days
11/11/19 – ZDI requested a new update and indicated the case was due
11/29/19 – ZDI requested an update
12/05/19 – ZDI communicated the vendor the intention to 0-day the case on December 12th

-- Mitigation:
Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the service to trusted machines. Only the clients and servers that have a legitimate procedural relationship with the service should be permitted to communicate with it. This could be accomplished in a number of ways, most notably with firewall rules/whitelisting.

• 2019-06-27 - Vulnerability reported to vendor
• 2019-12-12 - Coordinated public release of advisory