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ZKTeco ZKAccess Professional 3.5.3 Insecure File Permissions

ZKTeco ZKAccess Professional 3.5.3 Insecure File Permissions
Posted Aug 31, 2016
Authored by LiquidWorm | Site zeroscience.mk

ZKAccess 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) for 'Authenticated Users' group. Version 3.5.3 is affected.

tags | exploit
SHA-256 | e51af303de037c193cb718e87876e32f06f7a64a66a90955afc034c4e3dcc236

ZKTeco ZKAccess Professional 3.5.3 Insecure File Permissions

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ZKTeco ZKAccess Professional 3.5.3 Insecure File Permissions


Vendor: ZKTeco Inc. | Xiamen ZKTeco Biometric Identification Technology Co.,ltd
Product web page: http://www.zkteco.com
Affected version: 3.5.3 (Build 0005)

Summary: ZKAccess 3.5 is a desktop software which is suitable
for small and medium businesses application. Compatible with
all ZKAccess standalone reader controllers, the software can
simultaneously manage access control and generate attendance
report. The brand new flat GUI design and humanized structure
of new ZKAccess 3.5 will make your daily management more pleasant
and convenient.

Desc: ZKAccess 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) for 'Authenticated Users'
group.


Tested on: Microsoft Windows 7 Ultimate SP1 (EN)
Microsoft Windows 7 Professional SP1 (EN)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience


Advisory ID: ZSL-2016-5361
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5361.php


18.07.2016

--


C:\ZKTeco>icacls ZKAccess3.5
ZKAccess3.5 BUILTIN\Administrators:(I)(F)
BUILTIN\Administrators:(I)(OI)(CI)(IO)(F)
NT AUTHORITY\SYSTEM:(I)(F)
NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)
BUILTIN\Users:(I)(OI)(CI)(RX)
NT AUTHORITY\Authenticated Users:(I)(M)
NT AUTHORITY\Authenticated Users:(I)(OI)(CI)(IO)(M)

Successfully processed 1 files; Failed processing 0 files
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