V-SOL GPON/EPON OLT Platform v2.03 Unauthenticated Configuration Download

Title: V-SOL GPON/EPON OLT Platform v2.03 Unauthenticated Configuration Download
Advisory ID: ZSL-2019-5534
Type: Local/Remote
Impact: Security Bypass, Exposure of System Information, Exposure of Sensitive Information
Risk: (4/5)
Release Date: 26.09.2019
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.
Description
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.
Vendor
Guangzhou V-SOLUTION Electronic Technology Co., Ltd. - 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
Tested On
GoAhead-Webs
Vendor Status
N/A
PoC
gpon_olt_configdl.txt
Credits
Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>
References
[1] https://www.exploit-db.com/exploits/47433
[2] https://packetstormsecurity.com/files/154627
[3] https://cxsecurity.com/issue/WLB-2019090178
[4] https://exchange.xforce.ibmcloud.com/vulnerabilities/167770
Changelog
[26.09.2019] - Initial release
[03.10.2019] - Added reference [1], [2], [3] and [4]
Contact
Zero Science Lab

Web: http://www.zeroscience.mk
e-mail: lab@zeroscience.mk