Netgear WNR2000v3/WNR2000v4/WNR2000v5 /apply_noauth.cgi privileges management

Summaryinfo

A vulnerability categorized as critical has been discovered in Netgear WNR2000v3, WNR2000v4 and WNR2000v5. Affected by this issue is some unknown functionality of the file /apply_noauth.cgi. Such manipulation leads to privileges management. The attack may be launched remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in Netgear WNR2000v3, WNR2000v4 and WNR2000v5 (Wireless LAN Software) (affected version unknown). It has been rated as critical. Affected by this issue is an unknown functionality of the file /apply_noauth.cgi. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability.

The weakness was shared 12/20/2016 by Pedro Ribeiro as [0-day] RCE and admin credential disclosure in NETGEAR WNR2000 as not defined mailinglist post (Full-Disclosure). The advisory is available at seclists.org. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

A public exploit has been developed by Pedro Ribeiro in HTTP POST Request and been published immediately after the advisory. The exploit is available at seclists.org. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 85 days. During that time the estimated underground price was around $5k-$25k. The code used by the exploit is:

POST /apply_noauth.cgi?/reboot_waiting.htm HTTP/1.1
Host: 192.168.1.1
Content-Type: application/x-www-form-urlencoded
Content-Length: 26

submit_flag=reboot&yes=Yes

The mailinglist post contains the following remark:

NETGEAR did not respond to any emails, so THERE IS NO FIX for this vulnerability. It is recommended to replace this router with another make and model that supports OpenWRT firmware.

The entries VDB-94633 and VDB-94635 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Wireless LAN Software

Vendor

• Netgear

Name

• WNR2000v3
• WNR2000v4
• WNR2000v5

License

• commercial

Website

• Vendor: https://www.netgear.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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