Zero Science Lab » KZTech/JatonTec/Neotel JT3500V 4G LTE CPE 2.0.1 Hard-coded Credentials Shell Access

KZTech/JatonTec/Neotel JT3500V 4G LTE CPE 2.0.1 Hard-coded Credentials Shell Access

Title: KZTech/JatonTec/Neotel JT3500V 4G LTE CPE 2.0.1 Hard-coded Credentials Shell Access
Advisory ID: ZSL-2021-5637
Type: Local/Remote
Impact: System Access, DoS
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

The device utilizes hard-coded credentials within its Linux distribution image. These sets of credentials are never exposed to the end-user and cannot be changed through any normal operation of the router.

Vendor

KZ Broadband Technologies, Ltd. - http://www.kzbtech.com
Jaton Technology, Ltd. - http://www.jatontec.com
Neotel DOO - https://www.neotel.mk

Affected Version

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_hardcoded.txt

Credits

Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>

References

[1] https://www.exploit-db.com/exploits/49682
[2] https://packetstormsecurity.com/files/161883
[3] https://exchange.xforce.ibmcloud.com/vulnerabilities/198475
[4] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28259
[5] https://nvd.nist.gov/vuln/detail/CVE-2021-28259

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