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This Week
9 results · Page 1/1
Zbtlink router firmware ships an embedded remote-control implant, ENDLESSDOORS, present in every published build across the product line. It is the open-source ycsunjane/rctl tool built in as an OpenWrt package (librctl.so), started at boot and run as root under the process name kworker to blend in with the kernel's [kworker/*] threads. It opens no listening port; it phones home over cleartext TCP to a hardcoded command-and-control server (command channel 7000, interactive-shell callback 7001) with no authentication and no transport encryption, re-attempting contact roughly every 35 seconds. Its command handler passes any received string to popen() as uid=0, and a reserved rctlbash command returns an interactive root shell. Because the channel is unauthenticated and cleartext, control is not limited to whoever planted it: any party that answers at the C2 address, occupies the network path (DNS or route hijack), or acquires the hardcoded fallback domain obtains unauthenticated remote code execution as root.
A path-traversal vulnerability in the logout functionality of Shenzhen Zhibotong Electronics ZBT WE2001 23.09.27 allows remote attackers to delete arbitrary files on the host by supplying a crafted session cookie value.
A missing authentication mechanism in the web management API components of Shenzhen Zhibotong Electronics ZBT WE2001 23.09.27 allows unauthenticated attackers on the local network to modify router and network configurations. By invoking operations whose names end with "*_nocommit" and supplying the parameters expected by the invoked function, an attacker can change configuration data, including SSID, Wi-Fi credentials, and administrative passwords, without authentication or an existing session.