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Gjoko KrsticZSL-2023-5765

HistoryApr 10, 2023 - 12:00 a.m.

Sielco PolyEco Digital FM Transmitter 2.0.6 Account Takeover / Lockout / EoP

2023-04-1000:00:00

Gjoko Krstic

zeroscience.mk

137

sielco polyeco

digital fm transmitter

account takeover

lockout

eop

authentication bypass

privilege escalation

security bypass

vulnerability

sielco s.r.l

polyeco1000

polyeco500

polyeco300

touch-screen

remote control

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.8 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

39.3%

JSON

Title: Sielco PolyEco Digital FM Transmitter 2.0.6 Account Takeover / Lockout / EoP
Advisory ID: ZSL-2023-5765
Type: Local/Remote
Impact: Privilege Escalation, Security Bypass
Risk: (5/5)
Release Date: 10.04.2023

Summary

PolyEco is the innovative family of high-end digital FM transmitters of Sielco. They are especially suited as high performance power system exciters or compact low-mid power transmitters. The same cabinet may in fact be fitted with 50, 100, 300, 500, 1000W power stage (PolyEco50, 100, 300, 500, 1000).

All features can be controlled via the large touch-screen display 4.3" or remotely. Many advanced features are inside by default in the basic version such as: stereo and RDS encoder, audio change-over, remote-control via LAN and SNMP, “FFT” spectral analysis of the audio sources, SFN synchronization and much more.

Description

The application suffers from an authentication bypass, account takeover/lockout and elevation of privileges vulnerability that can be triggered by directly calling the users object and effectively modifying the password of the two constants user/role (user/admin). This can be exploited by an unauthenticated adversary by issuing a single POST request to the vulnerable endpoint and gain unauthorized access to the affected device with administrative privileges.

Vendor

Sielco S.r.l - <https://www.sielco.org>

Affected Version

PolyEco1000 CPU:2.0.6 FPGA:10.19
PolyEco1000 CPU:1.9.4 FPGA:10.19
PolyEco1000 CPU:1.9.3 FPGA:10.19
PolyEco500 CPU:1.7.0 FPGA:10.16
PolyEco300 CPU:2.0.2 FPGA:10.19
PolyEco300 CPU:2.0.0 FPGA:10.19

Tested On

lwIP/2.1.1 (http://savannah.nongnu.org/projects/lwip)

Vendor Status

[26.01.2023] Vulnerability discovered.
[27.01.2023] Contact with the vendor and CSIRT Italia.
[09.04.2023] No response from the vendor.
[09.04.2023] No response from the CSIRT team.
[10.04.2023] Public security advisory released.

PoC

sielco_polyeco_modif.txt

Credits

Vulnerability discovered by Gjoko Krstic - <[email protected]>

References

[1] <https://packetstormsecurity.com/files/171861/>
[2] <https://www.exploit-db.com/exploits/51371>
[3] <https://exchange.xforce.ibmcloud.com/vulnerabilities/269700>
[4] <https://exchange.xforce.ibmcloud.com/vulnerabilities/253063>
[5] <https://www.cisa.gov/news-events/ics-advisories/icsa-23-299-07>
[6] <https://nvd.nist.gov/vuln/detail/CVE-2023-46661>
[7] <https://cve.mitre.org/cgi-bin/cvename.cgi?name=2023-46661>
[8] <https://cxsecurity.com/issue/WLB-2023040053>

Changelog

[10.04.2023] - Initial release
[03.11.2023] - Added reference [1], [2], [3], [4], [5], [6], [7] and [8]

Contact

Zero Science Lab

Web: <https://www.zeroscience.mk>
e-mail: [email protected]

<html><body><p>Sielco PolyEco Digital FM Transmitter 2.0.6 Account Takeover / Lockout / EoP


Vendor: Sielco S.r.l
Product web page: https://www.sielco.org
Affected version: PolyEco1000 CPU:2.0.6 FPGA:10.19
                  PolyEco1000 CPU:1.9.4 FPGA:10.19
                  PolyEco1000 CPU:1.9.3 FPGA:10.19
                  PolyEco500 CPU:1.7.0 FPGA:10.16
                  PolyEco300 CPU:2.0.2 FPGA:10.19
                  PolyEco300 CPU:2.0.0 FPGA:10.19

Summary: PolyEco is the innovative family of high-end digital
FM transmitters of Sielco. They are especially suited as high
performance power system exciters or compact low-mid power
transmitters. The same cabinet may in fact be fitted with 50,
100, 300, 500, 1000W power stage (PolyEco50, 100, 300, 500,
1000).

All features can be controlled via the large touch-screen display
4.3" or remotely. Many advanced features are inside by default
in the basic version such as: stereo and RDS encoder, audio
change-over, remote-control via LAN and SNMP, "FFT" spectral
analysis of the audio sources, SFN synchronization and much more.

Desc: The application suffers from an authentication bypass,
account takeover/lockout and elevation of privileges vulnerability
that can be triggered by directly calling the users object and
effectively modifying the password of the two constants user/role
(user/admin). This can be exploited by an unauthenticated adversary
by issuing a single POST request to the vulnerable endpoint and
gain unauthorized access to the affected device with administrative
privileges.

Tested on: lwIP/2.1.1 (http://savannah.nongnu.org/projects/lwip)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
Macedonian Information Security Research and Development Laboratory
Zero Science Lab - https://www.zeroscience.mk - @zeroscience


Advisory ID: ZSL-2023-5765
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2023-5765.php


26.01.2023

--


# Change admin pwd
$ curl -X POST -F "pwd_admin=t00t" -F "pwd_user=" http://RADIOFM/protect/users.htm
</p></body></html>

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.8 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

39.3%

JSON

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