Title: Telesquare SKT LTE Router SDT-CS3B1 CSRF System Command Execution
Advisory ID: ZSL-2017-5443
Type: Local/Remote
Impact: Cross-Site Scripting, System Access
Risk: (4/5)
Release Date: 27.12.2017

Summary

We introduce SDT-CS3B1 LTE router which is a SKT 3G and 4G LTE wireless communication based LTE router product.

Description

The router suffers from authenticated arbitrary system command execution. The application interface allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. This can be exploited to perform certain actions with administrative privileges if a logged-in user visits a malicious web site.

Vendor

Telesquare Co., Ltd. - http://www.telesquare.co.kr

Affected Version

FwVer: SDT-CS3B1, sw version 1.2.0
LteVer: ML300S5XEA41_090 1 0.1.0
Modem model: PM-L300S

Tested On

lighttpd/1.4.20

Vendor Status

N/A

PoC

sdt-cs3b1_csrfrce.txt

Credits

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

References

[1] https://cxsecurity.com/issue/WLB-2017120299
[2] https://packetstormsecurity.com/files/145550
[3] https://www.exploit-db.com/exploits/43400/
[4] https://exchange.xforce.ibmcloud.com/vulnerabilities/136839

Changelog

[27.12.2017] - Initial release
[04.01.2018] - Added reference [1], [2], [3] and [4]

Contact

Zero Science Lab

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