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Automated Logic WebCTRL 6.5 Insecure File Permissions Privilege Escalation

Automated Logic WebCTRL 6.5 Insecure File Permissions Privilege Escalation
Posted Aug 23, 2017
Authored by LiquidWorm | Site zeroscience.mk

Automated Logic WebCTRL version 6.5 suffers from an insecure file permission privilege escalation vulnerability.

tags | exploit
advisories | CVE-2017-9644
MD5 | bfe85c9a0561b977ce1f85fffe2a9011

Automated Logic WebCTRL 6.5 Insecure File Permissions Privilege Escalation

Change Mirror Download

Automated Logic WebCTRL 6.5 Insecure File Permissions Privilege Escalation


Vendor: Automated Logic Corporation
Product web page: http://www.automatedlogic.com
Affected version: ALC WebCTRL, i-Vu, SiteScan Web 6.5 and prior
ALC WebCTRL, SiteScan Web 6.1 and prior
ALC WebCTRL, i-Vu 6.0 and prior
ALC WebCTRL, i-Vu, SiteScan Web 5.5 and prior
ALC WebCTRL, i-Vu, SiteScan Web 5.2 and prior

Summary: WebCTRLA(r), Automated Logic's web-based building automation
system, is known for its intuitive user interface and powerful integration
capabilities. It allows building operators to optimize and manage
all of their building systems - including HVAC, lighting, fire, elevators,
and security - all within a single HVAC controls platform. It's everything
they need to keep occupants comfortable, manage energy conservation measures,
identify key operational problems, and validate the results.

Desc: WebCTRL server/service suffers from an elevation of privileges vulnerability
which can be used by a simple authenticated user that can change the executable
file with a binary of choice. The vulnerability exist due to the improper permissions,
with the 'M' flag (Modify) or 'C' flag (Change) for 'Authenticated Users' group.
The application suffers from an unquoted search path issue as well impacting the service
'WebCTRL Service' for Windows deployed as part of WebCTRL server solution. 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 useras code would execute
with the elevated privileges of the application.

Tested on: Microsoft Windows 7 Professional SP1 (EN)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience


Advisory ID: ZSL-2017-5429
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5429.php

CVE ID: CVE-2017-9644
CVE URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9644


30.01.2017

---


sc qc "WebCTRL Service"

[SC] QueryServiceConfig SUCCESS

SERVICE_NAME: Webctrl Service
TYPE : 20 WIN32_SHARE_PROCESS
START_TYPE : 2 AUTO_START
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : C:\WebCTRL6.0\WebCTRL Service.exe -run
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : WebCTRL Service 6.0
DEPENDENCIES :
SERVICE_START_NAME : LocalSystem


cacls "C:\WebCTRL6.0\WebCTRL Service.exe"

C:\WebCTRL6.0\WebCTRL Service.exe
BUILTIN\Administrators:(ID)F
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Users:(ID)R
NT AUTHORITY\Authenticated Users:(ID)C


cacls "C:\WebCTRL6.0\WebCTRL Server.exe"

C:\WebCTRL6.0\WebCTRL Server.exe
BUILTIN\Administrators:(ID)F
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Users:(ID)R
NT AUTHORITY\Authenticated Users:(ID)C

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