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From: murdok.lnx at gmail.com (MurDoK) Subject: Thomson TCW690 POST Password Validation Vulnerability I found a vulnerability in this cablemodem which a malicious user inside *LAN can get the control of the cablemodem easily. This cablemodem model is given by the spanish ISP "AUNA". Details ======= Product: Thomson TCW690 cablemodem Affected Version: ST42.03.0a (not tested in minor versions) Immune Version: ??? Security-Risk: high Exploit: yes Product-URL: http://www.thomson.net/EN/Home/MiniSites/BAP/Cable/ModelDetail.html?category=cab%20modem%20Eurodocsis&model=TCW690 Vendor-URL: http://www.thomson.net/ Vendor-Status: informed but no response Description =========== The http server inside this cablemodem doesn't properly validate the supplied password when an user want to do some change in the configuration and sends a POST request. In the exploit I show how to change the admin password but you can also open ports, deny a user access, restore factory defaults, (all)... with a little changes. Exploit ======= Attached. Fix === No response from vendor. There isn't fix available. Vendor Status ============== 2005.02.06 - Bug found. 2005.02.07 - Informed the vendor broadband@...mson.net, no response. 2005.02.11 - Informed the vendor webmaster@...mson.net no response too. 2005.02.19 - Public disclosure. -------------- next part -------------- A non-text attachment was scrubbed... Name: mdk_tcw690.c Type: text/x-csrc Size: 2648 bytes Desc: not available Url : http://lists.grok.org.uk/pipermail/full-disclosure/attachments/20050219/08c8f0ff/mdk_tcw690.bin
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