Title: UBICOD Medivision Digital Signage 1.5.1 Privilege Escalation Through Authorization Bypass
Advisory ID: ZSL-2020-5575
Type: Local/Remote
Impact: Privilege Escalation
Risk: (4/5)
Release Date: 19.07.2020

Summary

Medivision is a service that provides everything from DID operation to development of DID (Digital Information Display) optimized for hospital environment and production of professional contents, through DID product installation, image, video content planning, design work, and remote control. This is a one-stop solution that solves management at once.

Description

The application suffers from a privilege escalation vulnerability. Normal user can elevate his/her privileges by navigating to /html/user (via IDOR) page sending an HTTP GET request setting the parameter 'ft[grp]' to integer value '3' gaining super admin rights.

Vendor

UBICOD Co., Ltd. | MEDIVISION INC. - http://www.medivision.co.kr

Affected Version

Firmware 1.5.1 (2013.01.3)

Tested On

Apache/2.4.7 (Ubuntu)
PHP/5.5.9-1ubuntu4.22

Vendor Status

[19.06.2020] Vulnerability discovered.
[21.06.2020] Vendor contacted.
[18.07.2020] No response from the vendor.
[19.07.2020] Public security advisory released.

PoC

ubicod_privesc.txt

Credits

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

References

[1] https://packetstormsecurity.com/files/158479/UBICOD-Medivision-Digital-Signage-1.5.1-Privilege-Escalation.html
[2] https://exchange.xforce.ibmcloud.com/vulnerabilities/185537
[3] https://www.exploit-db.com/exploits/48684

Changelog

[19.07.2020] - Initial release
[24.07.2020] - Added reference [1], [2] and [3]

Contact

Zero Science Lab

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