Title: Screen SFT DAB 600/C Unauthenticated Information Disclosure (userManager.cgx)
Advisory ID: ZSL-2023-5776
Type: Local/Remote
Impact: Spoofing, Exposure of System Information, Exposure of Sensitive Information
Risk: (3/5)
Release Date: 13.05.2023

Summary

Screen's new radio DAB Transmitter is reaching the highest technology level in both Digital Signal Processing and RF domain. SFT DAB Series - Compact Radio DAB Transmitter - Air. Thanks to the digital adaptive precorrection and configuatio flexibility, the Hot Swap System technology, the compactness and the smart system design, the SFT DAB are advanced transmitters. They support standards DAB, DAB+ and T-DMB and are compatible with major headend brands.

Description

Screen is affected by an information disclosure vulnerability due to improper access control enforcement. An unauthenticated remote attacker can exploit this, via a specially crafted request to gain access to sensitive information including usernames and source IP addresses.

Vendor

DB Elettronica Telecomunicazioni SpA - https://www.screen.it | https://www.dbbroadcast.com

Affected Version

Firmware: 1.9.3
Bios firmware: 7.1 (Apr 19 2021)
Gui: 2.46
FPGA: 169.55
uc: 6.15

Tested On

Keil-EWEB/2.1
MontaVista® Linux® Carrier Grade eXpress (CGX)

Vendor Status

[19.03.2023] Vulnerability discovered.
[20.03.2023] Vendor contacted.
[12.05.2023] No response from the vendor.
[13.05.2023] Public security advisory released.

PoC

screen_info.py

Credits

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

References

[1] https://www.exploit-db.com/exploits/51460
[2] https://packetstormsecurity.com/files/172332/

Changelog

[13.05.2023] - Initial release
[12.10.2023] - Added reference [1] and [2]

Contact

Zero Science Lab

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