TP-LINK TD-W8901N v1

multiple revisions of this device, use caution

bgn (N150)
150Mbps Wireless N ADSL2+ Modem Router
Wikipedia	TP-Link
3rd Party Firmware
dd-wrt	Incompatible
OpenWrt	Incompatible
Tomato any flavor	Incompatible
Platform
Brand • Model • Rev	TP-LINK TD-W8901N v1
FCC ID	TE7TDW8901NV1
IC ID	8853A-W8901N
Board ID	2011500135
Type	wireless router, dsl modem
CPU1	Ralink RT63365E
CPU1 Type	MIPS 34KEc
CPU1 Speed	500 MHz
Flash1 Chip	Winbond W25Q16DVSIG
Flash1 Size	2 MiB2,097,152 B <br />16,384 Kib <br />2,048 KiB <br />16 Mib <br />0.00195 GiB <br />
RAM1 Size	8 MiB8,388,608 B <br />65,536 Kib <br />8,192 KiB <br />64 Mib <br />0.00781 GiB <br />
RAM1 Chip	ESMT M12L64164A-5T
ETH chip1	Ralink RT63365E
Switch	Ralink RT63365E
Ethernet Port Count	4-100MbE-LAN
Wired Standard	IEEE 802.3i/3u
802dot11 OUI: A0:F3:C1 (7 E, 7 W), E8:94:F6 (2 E, 3 W) Ethernet OUI: A0:F3:C1 (7 E, 7 W), E8:94:F6 (2 E, 3 W)
Expansion IF types	none specified
Power	9 VDC, 0.6 A
Connector type	barrel
Other
Default IP address: 192.168.1.1 the IP 192.168.1.1 is used by 1323 additional devices of which 111 are TP-LINK devices Default login user: admin Default login password: admin admin:admin credentials used by 1340 additional devices of which 280 are TP-LINK devices
Manuf/OEM/ODM	TP-LINK
Retail
FCC approval date	24 May 2013
Country of manuf	China
Radio 1
Chip1	Ralink RT5390
Wireless interface OUI	A0:F3:C1, E8:94:F6
Antenna Connector Type	none specified
MIMO status	1x1:1
Wireless Standard	IEEE 802.11b/g/n
802.11n	up to 150 Mbps
802.11g	up to 54 Mbps
802.11b	up to 11 Mbps
WiFi Operating Frequency	2.4 GHz
CPU1 brand Radio1 chip1 brand Radio1 chip2 brand TP-LINK TD-W8901N v1 Ralink Ralink TP-LINK TD-W8901N v2 Ralink MediaTek

For a list of all currently documented Ralink chipsets with specifications, see Ralink.

For a list of all currently documented TP-LINK device with specifications, see TP-LINK.

• 150 Mbps - 1SS 2.4GHz 802.11n (40MHz chan.) = N150 class

Overview

"2011500135" is silkscreened on the board in the FCC photos.

The SoC used is a Ralink RT63365E.

A MAC address w/ a A0:F3:C1 OUI is shown on the FCC EUT's label.

FCC unit has RAM chip by EtronTech.

From an actual unit (not FCC):

• Ralink RT63365E
• ESMT M12L64164A-5T
• Winbond 25Q16DVSIG
• Ralink RT5390RL
• Ralink RT63087N (ADSL Front-End)
• MAC Address: E8:94:F6:xx:xx:xx

Operating System: "RAS"

(OS genealogy: w:ThreadX OS by Express Logic/Green Hills ->

w:ZyNOS by ZyXEL -> used by TrendChip -> RAS OS by Ralink)

The hardware is OK, the firmware is crap:

• The device ships with firmware V1_121121:
  • has port 7547 OPEN to the internet (admin/admin)
  • allows direct download of the router configuration file at:

http://192.168.1.1/ROM-0

• vulnerable to Misfortune Cookie (RCE) on WAN port: RCE

• Latest available firmware V1_140227:
  • closed port 7547 from WAN side (LAN side is still open)
  • still vulnerable to Misfortune Cookie (RCE) on LAN port, not on WAN port
  • leaks random internal memory blocks in IGMP packets trailing data

(username, password and various packet fragments have been seen)

• IGMP cannot be disabled

• • "fixed" the ROM-0 vulnerability by requiring a valid referrer

in the http request... (easy to bypass)

Open LAN (local) ports (in latest firmware V1_140227):

• 21/tcp (ftp)
• 23/tcp (telnet)
• 80/tcp (web)
• 7547/tcp (tr069/CWMP - CPE WAN Management Protocol)

- even if disabled in web interface

Web server (port 80 and port 7547): RomPager/4.07 UPnP/1.0

(vulnerable to Misfortune Cookie)

Web interface is basic. Telnet interface has a metric assload of configuration

options and diagnostic pages, (very partially) detailed in: Ref. Manual