Title: dbaudio R1 v2.14.4 DNS-SD Service Unquoted Service Path Privilege Escalation
Advisory ID: ZSL-2016-5293
Type: Local
Impact: Privilege Escalation
Risk: (2/5)
Release Date: 14.01.2016

Summary

The R1 Remote control software succeeds the d&b ROPE C software. It is a software package designed to operate d&b amplifiers (D12, D6, E-PAC with Display) remotely using the d&b Remote network based on CAN-Bus technology.

Description

The application suffers from an unquoted search path issue impacting the service 'dbaudio DNS-SD' for Windows deployed as part of dbaudio R1. This could potentially allow an authorized but non-privileged local user to execute arbitrary code with elevated privileges on the system. A successful attempt would require the local user to be able to insert their code in the system root path undetected by the OS or other security applications where it could potentially be executed during application startup or reboot. If successful, the local user’s code would execute with the elevated privileges of the application.

Vendor

d&b audiotechnik GmbH - http://www.dbaudio.com

Affected Version

R1 2.14.4 and DNS-SD 379.32.2

Tested On

Microsoft Windows 7 Professional SP1 (EN)
Microsoft Windows 7 Ultimate SP1 (EN)

Vendor Status

[01.12.2015] Vulnerability discovered.
[05.12.2015] Vendor contacted.
[06.01.2016] No response from the vendor.
[14.01.2015] Public security advisory released.

PoC

dbaudio_eop.txt

Credits

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

References

[1] https://packetstormsecurity.com/files/135275
[2] https://cxsecurity.com/issue/WLB-2016010086

Changelog

[14.01.2016] - Initial release
[16.01.2016] - Added reference [1] and [2]

Contact

Zero Science Lab

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