Title: SOYAL Biometric Access Control System 5.0 Weak Default Credentials
Advisory ID: ZSL-2021-5631
Type: Local/Remote
Impact: System Access
Risk: (4/5)
Release Date: 18.03.2021

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.

Description

The web control panel uses weak set of default administrative credentials (no password) that can be easily guessed in remote password attacks.

Vendor

SOYAL Technology Co., Ltd - 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

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

Vendor Status

[25.01.2021] Vulnerability discovered.
[03.02.2021] Vendor contacted.
[08.02.2021] No response from the vendor.
[09.02.2021] Distributor responds and informs vendor.
[09.02.2021] Sent details to distributor.
[10.02.2021] Asked distributor for status update.
[11.02.2021] Vendor will patch the issue.
[18.03.2021] Public security advisory released.

PoC

soyal_creds.txt

Credits

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

References

[1] https://exchange.xforce.ibmcloud.com/vulnerabilities/198553
[2] https://packetstormsecurity.com/files/161875/
[3] https://cxsecurity.com/issue/WLB-2021030119
[4] https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28266
[5] https://nvd.nist.gov/vuln/detail/CVE-2021-28266

Changelog

[18.03.2021] - Initial release
[23.03.2021] - Added reference [1], [2] and [3]
[19.06.2021] - Added reference [4] and [5]

Contact

Zero Science Lab

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