Gjoko KrsticZSL-2016-5310Crouzet em4 soft 1.1.04 and M3 soft 3.1.2.0 Insecure File Permissions
7.2 High
AI Score
Confidence
Low
Title: Crouzet em4 soft 1.1.04 and M3 soft 3.1.2.0 Insecure File Permissions
Advisory ID: ZSL-2016-5310
Type: Local/Remote
Impact: Privilege Escalation
Risk: (2/5)
Release Date: 29.02.2016
Summary
em4 is more than just a nano-PLC. It is a leading edge device supported by best-in-class tools that enables you to create and implement the smartest automation applications. Millenium 3 (M3) is easy to program and to implement, it enables the control and monitoring of machines and automation installations with up to 50 I/O. It is positioned right at the heart of the Crouzet Automation range.
Description
em4 soft and M3 soft 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 ‘C’ flag (Change) for ‘Everyone’ group.
Vendor
Crouzet Automatismes SAS - <http://www.crouzet-automation.com>
Affected Version
em4 soft (1.1.04 and 1.1.03.01)
M3 soft (3.1.2.0)
Tested On
Microsoft Windows 7 Professional SP1 (EN)
Microsoft Windows 7 Ultimate SP1 (EN)
Vendor Status
[25.01.2016] Vulnerability discovered.
[03.02.2016] Vendor contacted.
[28.02.2016] No response from the vendor.
[29.02.2016] Public security advisory released.
PoC
Credits
Vulnerability discovered by Gjoko Krstic - <[email protected]>
References
[1] <https://cxsecurity.com/issue/WLB-2016030012>
[2] <https://packetstormsecurity.com/files/136021>
[3] <https://www.exploit-db.com/exploits/39510/>
[4] <https://exchange.xforce.ibmcloud.com/vulnerabilities/111165>
Changelog
[29.02.2016] - Initial release
[01.03.2016] - Added reference [1], [2] and [3]
[03.03.2016] - Added reference [4]
Contact
Zero Science Lab
Web: <http://www.zeroscience.mk>
e-mail: [email protected]
<html><body><p>Crouzet em4 soft 1.1.04 and M3 soft 3.1.2.0 Insecure File Permissions
Vendor: Crouzet Automatismes SAS
Product web page: http://www.crouzet-automation.com
Affected version: em4 soft (1.1.04 and 1.1.03.01)
M3 soft (3.1.2.0)
Summary: em4 is more than just a nano-PLC. It is a leading
edge device supported by best-in-class tools that enables
you to create and implement the smartest automation applications.
Millenium 3 (M3) is easy to program and to implement, it enables
the control and monitoring of machines and automation installations
with up to 50 I/O. It is positioned right at the heart of the
Crouzet Automation range.
Desc: em4 soft and M3 soft 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 'C' flag (Change) for
'Everyone' group.
Tested on: Microsoft Windows 7 Professional SP1 (EN)
Microsoft Windows 7 Ultimate SP1 (EN)
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience
Advisory ID: ZSL-2016-5310
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5310.php
25.01.2016
--
C:\Program Files (x86)\Crouzet automation>cacls "em4 soft"
C:\Program Files (x86)\Crouzet automation\em4 soft Everyone:(OI)(CI)C
NT SERVICE\TrustedInstaller:(ID)F
NT SERVICE\TrustedInstaller:(CI)(IO)(ID)F
NT AUTHORITY\SYSTEM:(ID)F
NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(ID)F
BUILTIN\Administrators:(ID)F
BUILTIN\Administrators:(OI)(CI)(IO)(ID)F
BUILTIN\Users:(ID)R
BUILTIN\Users:(OI)(CI)(IO)(ID)(special access:)
GENERIC_READ
GENERIC_EXECUTE
CREATOR OWNER:(OI)(CI)(IO)(ID)F
C:\Program Files (x86)\Crouzet automation>cd "em4 soft"
C:\Program Files (x86)\Crouzet automation\em4 soft>cacls *.exe
C:\Program Files (x86)\Crouzet automation\em4 soft\em4 soft.exe Everyone:(ID)C
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Administrators:(ID)F
BUILTIN\Users:(ID)R
C:\Program Files (x86)\Crouzet automation\em4 soft\unins000.exe Everyone:(ID)C
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Administrators:(ID)F
BUILTIN\Users:(ID)R
C:\Program Files (x86)\Crouzet automation\em4 soft>
================================================================================================
C:\Program Files (x86)\Crouzet Automatismes>cacls "Millenium 3"
C:\Program Files (x86)\Crouzet Automatismes\Millenium 3 Everyone:(OI)(CI)C
NT SERVICE\TrustedInstaller:(ID)F
NT SERVICE\TrustedInstaller:(CI)(IO)(ID)F
NT AUTHORITY\SYSTEM:(ID)F
NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(ID)F
BUILTIN\Administrators:(ID)F
BUILTIN\Administrators:(OI)(CI)(IO)(ID)F
BUILTIN\Users:(ID)R
BUILTIN\Users:(OI)(CI)(IO)(ID)(special access:)
GENERIC_READ
GENERIC_EXECUTE
CREATOR OWNER:(OI)(CI)(IO)(ID)F
C:\Program Files (x86)\Crouzet Automatismes>cd "Millenium 3"
C:\Program Files (x86)\Crouzet Automatismes\Millenium 3>cacls *.exe
C:\Program Files (x86)\Crouzet Automatismes\Millenium 3\M3 soft.exe Everyone:(ID)C
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Administrators:(ID)F
BUILTIN\Users:(ID)R
C:\Program Files (x86)\Crouzet Automatismes\Millenium 3\unins000.exe Everyone:(ID)C
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Administrators:(ID)F
BUILTIN\Users:(ID)R
C:\Program Files (x86)\Crouzet Automatismes\Millenium 3>
</p></body></html>7.2 High
AI Score
Confidence
Low