Symantec pcAnywhere Insecure File Permissions Local Privilege Escalation

2012-05-02T00:00:00
ID 1337DAY-ID-18181
Type zdt
Reporter Edward Torkington
Modified 2012-05-02T00:00:00

Description

Exploit for windows platform in category local exploits

                                        
                                            =======
Summary
=======
Name: Symantec pcAnywhere insecure file permissions local privilege escalation
Release Date: 30 April 2012
Reference: NGS00117
Discoverer: Edward Torkington <[email protected]>
Vendor: Symantec
Vendor Reference:
Systems Affected:
 
Symantec pcAnywhere 12.5.x
IT Management Suite 7.0 pcAnywhere Solution 12.5.x
IT Management Suite 7.1 pcAnywhere Solution 12.6.x
 
Risk: High
Status: Fixed
 
========
TimeLine
========
Discovered: 23 August 2011
Released: 14 September 2011
Approved: 14 September 2011
Reported: 23 August 2011
Fixed: 24 January 2012
Published: 30 April 2012
 
===========
Description
===========
 
Inadequate file permissions on application binaries could result on local privilege escalation
 
=================
Technical Details
=================
A number of key files in the C:\Program Files\Symantec\pcAnywhere\ folder are writable by any user:
 
C:\Program Files\Symantec\pcAnywhere\WinAw32.exe Everyone:(OI)(CI)F
                                                NT
AUTHORITY\SYSTEM:(OI)(CI)F
 
C:\Program Files\Symantec\pcAnywhere\awrem32.exe Everyone:(OI)(CI)F
                                                NT
AUTHORITY\SYSTEM:(OI)(CI)F
 
C:\Program Files\Symantec\pcAnywhere\awhost32.exe Everyone:(OI)(CI)F
                                                 NT
AUTHORITY\SYSTEM:(OI)(CI)F
 
It is trivial to replace these .exe (including the main pcanywhere exe, winaw32.exe with a malicious binary). When launched by the admin, privilege escalation would be gained. The awhost32.exe is set as a service under some scenarios (SYSTEM) and allows a user to privilege escalate by overwriting this binary.
 
===============
Fix Information
===============
 
An updated version of the software has been released to address these vulnerabilities:
http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security
_advisory&pvid=security_advisory&year=2012&suid=20120124_00 



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