V-SOL GPON/EPON OLT Platform 2.03 – Unauthenticated Configuration Download
# Title: V-SOL GPON/EPON OLT Platform 2.03 - Unauthenticated Configuration Download # Date: 2019-09-27 # Author: LiquidWorm # 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 device OLT Web Management Interface is vulnerable to unauthenticated configuration download and information disclosure vulnerability when direct object reference is made to the usrcfg.conf file using an HTTP GET method. This will enable the attacker to disclose sensitive information and help her in authentication bypass, privilege escalation and/or full system access. Tested on: GoAhead-Webs Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2019-5534 Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5534.php 25.09.2019 -- # PoC 1# curl http://192.168.8.200/device/usrcfg.conf 2# curl http://192.168.8.201/action/usrcfg.conf |