Title: Elber Reble610 M/ODU XPIC IP-ASI-SDH Microwave Link Authentication Bypass
Advisory ID: ZSL-2024-5818
Type: Local/Remote
Impact: Security Bypass, Privilege Escalation, System Access, DoS
Risk: (5/5)
Release Date: 17.04.2024

Summary

The REBLE610 features an accurate hardware design, absence of internal cabling and full modularity. The unit is composed by a basic chassis with 4 extractable boards which makes maintenance and critical operations, like frequency modification, easy and efficient. The modular approach has brought to the development of the digital processing module (containing modulator, demodulator and data interface) and the RF module (containing Transmitter, Receiver and channel filters). From an RF point of view, the new transmission circuitry is able to guarantee around 1 Watt with every modulation scheme, introducing, in addition, wideband precorrection (up to 1GHz depending on frequency band).

Description

The device suffers from an authentication bypass vulnerability through a direct and unauthorized access to the password management functionality. The issue allows attackers to bypass authentication by manipulating the set_pwd endpoint that enables them to overwrite the password of any user within the system. This grants unauthorized and administrative access to protected areas of the application compromising the device's system security.

Vendor

Elber S.r.l. - https://www.elber.it

Affected Version

0.01 Revision 0

Tested On

NBFM Controller
embOS/IP

Vendor Status

[18.08.2023] Vulnerability discovered.
[20.08.2023] Vendor contacted.
[29.09.2023] No response from the vendor.
[09.12.2023] Vendor contacted.
[02.02.2024] No response from the vendor.
[16.03.2024] Vendor contacted.
[16.04.2024] No response from the vendor.
[17.04.2024] Public security advisory released.

PoC

elber_reble_auth.txt

Credits

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

References

[1] https://packetstormsecurity.com/files/178138/
[2] https://www.exploit-db.com/exploits/52006

Changelog

[17.04.2024] - Initial release
[22.05.2024] - Added reference [1] and [2]

Contact

Zero Science Lab

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