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V-SOL GPON/EPON OLT Platform v2.03 Link Manipulation Vulnerability  
  
  
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: Input passed via the 'parent' GET parameter in 'bindProfile.html' script  
is not properly verified before being used to redirect users. This can be  
exploited to redirect a logged-in user to an arbitrary website e.g. when a  
user clicks a specially crafted link to the affected script hosted on a trusted  
domain.  
  
Tested on: GoAhead-Webs  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2019-5535  
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5535.php  
  
25.09.2019  
  
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CSRF URL Redirect request:  
  
GET /action/bindProfile.html?parent=https://zeroscience.mk/index  
Host: 192.168.8.200  
  
  
Response:   
  
HTTP/1.1 200 OK  
Location: https://zeroscience.mk/index.html?select=0