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Certec EDV atvise SCADA server 2.5.9 Privilege Escalation Vulnerability

Low
Advisory ID
ZSL-2016-5321
Release Date
08 May 2016
Vendor
Certec EDV GmbH - http://www.atvise.com
Affected Version
2.5.9
CVE
N/A
Tested On
Microsoft Windows 7 Professional SP1 (EN) 64-bit, Microsoft Windows 7 Ultimate SP1 (EN) 64-bit
Summary

atvise scada is based on newest technologies and standards: The visualization in pure web technology as well as a consistent vertical object orientation based on OPC UA changes the world of process management systems.

Description

The application suffers from an unquoted search path issue impacting the service 'atserver' for Windows deployed as part of atvise SCADA. 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.

Proof of Concept
Disclosure Timeline
17.03.2016Vulnerability discovered.
05.04.2016Vendor contacted.
06.04.2016Vendor responds asking more details.
06.04.2016Sent details to the vendor.
07.04.2016Vendor confirms the issue scheduling version 3.0 to be released by end of April.
29.04.2016Vendor releases version 3.0.0 to address this issue.
15.05.2016Coordinated public security advisory released.
Credits
Vulnerability discovered by Gjoko Krstic
References
Changelog
08.05.2016Initial release
21.05.2016Added reference [3], [4] and [5]