The Alcatel Lucent I-240W-Q GPON ONT using firmware version 3FE54567BOZJ19 allows a remote, unauthenticated attacker to enable telnetd on the router via a crafted HTTP request.

The Alcatel Lucent I-240W-Q GPON ONT using firmware version 3FE54567BOZJ19 is vulnerable to a stack buffer overflow via crafted HTTP POST request sent by a remote, unauthenticated attacker to /GponForm/fsetup_Form. An attacker can leverage this vulnerability to potentially execute arbitrary code.

The Alcatel Lucent I-240W-Q GPON ONT using firmware version 3FE54567BOZJ19 contains multiple hard coded credentials for the Telnet and SSH interfaces.

The Alcatel Lucent I-240W-Q GPON ONT using firmware version 3FE54567BOZJ19 is vulnerable to a stack buffer overflow via crafted HTTP POST request sent by a remote, authenticated attacker to /GponForm/usb_Form?script/. An attacker can leverage this vulnerability to potentially execute arbitrary code.

The Alcatel Lucent I-240W-Q GPON ONT using firmware version 3FE54567BOZJ19 is vulnerable to command injection via crafted HTTP request sent by a remote, authenticated attacker to /GponForm/usb_restore_Form?script/.

An issue was discovered on Dasan GPON home routers. Command Injection can occur via the dest_host parameter in a diag_action=ping request to a GponForm/diag_Form URI. Because the router saves ping results in /tmp and transmits them to the user when the user revisits /diag.html, it's quite simple to execute commands and retrieve their output.

An issue was discovered on Dasan GPON home routers. It is possible to bypass authentication simply by appending "?images" to any URL of the device that requires authentication, as demonstrated by the /menu.html?images/ or /GponForm/diag_FORM?images/ URI. One can then manage the device.

Zhone GPON 2520 with firmware R4.0.2.566b allows remote attackers to cause a denial of service via a long string in the oldpassword parameter.