KZTech/JatonTec/Neotel JT3500V 4G LTE CPE 2.0.1 Unauthenticated Config Download

Title: KZTech/JatonTec/Neotel JT3500V 4G LTE CPE 2.0.1 Unauthenticated Config Download
Advisory ID: ZSL-2021-5644
Type: Local/Remote
Impact: Security Bypass, Exposure of System Information, Exposure of Sensitive Information, System Access, DoS, Privilege Escalation
Risk: (5/5)
Release Date: 18.03.2021
Summary
JT3500V is a most advanced LTE-A Pro CAT12 indoor Wi-Fi & VoIP CPE product specially designed to enable quick and easy LTE fixed data service deployment for residential and SOHO customers. It provides high speed LAN, Wi-Fi and VoIP integrated services to end users who need both bandwidth and multi-media data service in residential homes or enterprises. The device has 2 Gigabit LAN ports, 1 RJ11 analog phone port, high performance 4x4 MIMO and CA capabilities, 802.11b/g/n/ac dual band Wi-Fi, advanced routing and firewall software for security. It provides an effective all-in-one solution to SOHO or residential customers. It can deliver up to 1Gbps max data throughput which can be very competitive to wired broadband access service.
Description
JT3500V is vulnerable to unauthenticated configuration disclosure when direct object reference is made to the export_settings.cgi file using an HTTP GET request. This will enable the attacker to disclose sensitive information and help her in authentication bypass, privilege escalation and full system access.
Vendor
KZ Broadband Technologies, Ltd. - http://www.kzbtech.com
Jaton Technology, Ltd. - http://www.jatontec.com
Neotel DOO - https://www.neotel.mk
Affected Version
Model | Firmware

JT3500V | 2.0.1B1064
JT3300V | 2.0.1B1047
AM6200M | 2.0.0B3210
AM6000N | 2.0.0B3042
AM5000W | 2.0.0B3037
AM4200M | 2.0.0B2996
AM4100V | 2.0.0B2988
AM3500MW | 2.0.0B1092
AM3410V | 2.0.0B1085
AM3300V | 2.0.0B1060
AM3100E | 2.0.0B981
AM3100V | 2.0.0B946
AM3000M | 2.0.0B21
KZ7621U | 2.0.0B14
KZ3220M | 2.0.0B04
KZ3120R | 2.0.0B01
Tested On
GoAhead-Webs/2.5.0 PeerSec-MatrixSSL/3.1.3-OPEN
Linux 2.6.36+ (mips)
Mediatek APSoC SDK v4.3.1.0
Vendor Status
[03.02.2021] Vulnerability discovered.
[05.02.2021] Contact with Neotel.
[07.02.2021] Contact with KZ Tech.
[08.02.2021] Contact with Jaton Tech.
[09.02.2021] Contact with Neotel.
[12.02.2021] Contact with MKD-CIRT.
[12.02.2021] MKD-CIRT opens a case, informs Neotel.
[17.03.2021] No response from the vendors.
[18.03.2021] Public security advisory released.
PoC
jt3500v_config.txt
Credits
Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>
References
[1] https://www.exploit-db.com/exploits/49686
[2] https://exchange.xforce.ibmcloud.com/vulnerabilities/198536
[3] https://packetstormsecurity.com/files/161890/
[4] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28258
[5] https://nvd.nist.gov/vuln/detail/CVE-2021-28258
Changelog
[18.03.2021] - Initial release
[23.03.2021] - Added reference [1], [2] and [3]
[19.06.2021] - Added reference [4] and [5]
Contact
Zero Science Lab

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