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table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Arial","sans-serif"; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:major-bidi;} </style> <![endif]--><!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="3074"/> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1"/> </o:shapelayout></xml><![endif]--> </head> <body lang=EN-US link=blue vlink=purple style='tab-interval:36.0pt'> <div class=Section1> <p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span style='font-family:"Arial","sans-serif"'>Lesson Plan Title:</span></b><span style='font-family:"Arial","sans-serif"'> How to Perform Command Injection <o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span style='font-family:"Arial","sans-serif"'>Concept / Topic To Teach: </span></b><span style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Command injection attacks represent a serious threat to any parameter-driven site. The methods behind an attack are easy to learn and the damage caused can range from considerable to complete system compromise. Despite these risks an incredible number of systems on the internet are susceptible to this form of attack. <o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Not only is it a threat easily instigated, it is also a threat that, with a little common-sense and forethought, can be almost totally prevented. This lesson will show the student several examples of parameter injection.<o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>It is always good practice to sanitize all input data, especially data that will used in OS command, scripts, and database queries.<o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span style='font-family:"Arial","sans-serif"'>General Goal(s): <o:p></o:p></span></b></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>The user should be able to execute any command on the hosting OS.<o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p class=MsoNormal style='page-break-after:avoid'><span style='font-family: "Arial","sans-serif";mso-no-proof:yes'><!--[if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"/> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"/> <v:f eqn="sum @0 1 0"/> <v:f eqn="sum 0 0 @1"/> <v:f eqn="prod @2 1 2"/> <v:f eqn="prod @3 21600 pixelWidth"/> <v:f eqn="prod @3 21600 pixelHeight"/> <v:f eqn="sum @0 0 1"/> <v:f eqn="prod @6 1 2"/> <v:f eqn="prod @7 21600 pixelWidth"/> <v:f eqn="sum @8 21600 0"/> <v:f eqn="prod @7 21600 pixelHeight"/> <v:f eqn="sum @10 21600 0"/> </v:formulas> <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"/> <o:lock v:ext="edit" aspectratio="t"/> </v:shapetype><v:shape id="Picture_x0020_1375" o:spid="_x0000_i1028" type="#_x0000_t75" style='width:480pt;height:276.75pt;visibility:visible;mso-wrap-style:square'> <v:imagedata src="lesson_solutions/CommandInjection_files/image001.png" o:title=""/> </v:shape><![endif]--><![if !vml]><img width=640 height=369 src="lesson_solutions/CommandInjection_files/image007.jpg" v:shapes="Picture_x0020_1375"><![endif]></span></p> <p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element: field-begin'></span><span style='mso-spacerun:yes'>�</span>SEQ Figure \* ARABIC <span style='mso-element:field-separator'></span><![endif]--><span style='mso-no-proof:yes'>1</span><!--[if supportFields]><span style='mso-element: field-end'></span><![endif]--> Lesson 16<span style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span style='font-family:"Arial","sans-serif"'>Solution:<o:p></o:p></span></b></p> <p class=MsoNormal><b style='mso-bidi-font-weight:normal'><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></b></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Select a lesson from the drop-down box and click on "View".<o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif";mso-no-proof: yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_1376" o:spid="_x0000_i1027" type="#_x0000_t75" style='width:480pt;height:276.75pt;visibility:visible; mso-wrap-style:square'> <v:imagedata src="lesson_solutions/CommandInjection_files/image001.png" o:title=""/> </v:shape><![endif]--><![if !vml]><img width=640 height=369 src="lesson_solutions/CommandInjection_files/image007.jpg" v:shapes="Picture_x0020_1376"><![endif]></span><span style='font-family:"Arial","sans-serif"'><o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p><span style='font-family:"Arial","sans-serif"'>Intercept the request with WebScarab when you click on "View". Append " & netstat −an & ipconfig"to the HelpFile parameter. Do not forget the double quote!<o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p class=MsoNormal style='page-break-after:avoid'><span style='font-family: "Arial","sans-serif";mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_1377" o:spid="_x0000_i1026" type="#_x0000_t75" style='width:459.75pt;height:362.25pt; visibility:visible;mso-wrap-style:square'> <v:imagedata src="lesson_solutions/CommandInjection_files/image003.png" o:title=""/> </v:shape><![endif]--><![if !vml]><img width=613 height=483 src="lesson_solutions/CommandInjection_files/image008.jpg" v:shapes="Picture_x0020_1377"><![endif]></span></p> <p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element: field-begin'></span><span style='mso-spacerun:yes'>�</span>SEQ Figure \* ARABIC <span style='mso-element:field-separator'></span><![endif]--><span style='mso-no-proof:yes'>2</span><!--[if supportFields]><span style='mso-element: field-end'></span><![endif]--> Injecting command netstat & ipconfig</p> <p class=MsoNormal><o:p> </o:p></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>The result contains the output of the command netstat and ipconfig.<o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p class=MsoNormal style='page-break-after:avoid'><span style='font-family: "Arial","sans-serif";mso-no-proof:yes'><!--[if gte vml 1]><v:shape id="Picture_x0020_1378" o:spid="_x0000_i1025" type="#_x0000_t75" style='width:480pt;height:276.75pt; visibility:visible;mso-wrap-style:square'> <v:imagedata src="lesson_solutions/CommandInjection_files/image005.png" o:title=""/> </v:shape><![endif]--><![if !vml]><img width=640 height=369 src="lesson_solutions/CommandInjection_files/image009.jpg" v:shapes="Picture_x0020_1378"><![endif]></span></p> <p class=MsoCaption>Figure <!--[if supportFields]><span style='mso-element: field-begin'></span><span style='mso-spacerun:yes'>�</span>SEQ Figure \* ARABIC <span style='mso-element:field-separator'></span><![endif]--><span style='mso-no-proof:yes'>3</span><!--[if supportFields]><span style='mso-element: field-end'></span><![endif]--> Command Injection results<span style='font-family: "Arial","sans-serif"'><o:p></o:p></span></p> <p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p> <p class=MsoNormal><o:p> </o:p></p> </div> <table align='RIGHT' cellspacing='0' width='90%' border='0' cellpadding='0'> <tr> <td valign='MIDDLE' width='100%' align='RIGHT class=MsoNormal' style='font-family:"Arial","sans-serif"'> Solution by Erwin Geirnaert </td> <td valign='MIDDLE' align='RIGHT'><img hspace='0' vspace='0' border='0' alt='ZION SECURITY' src='images/logos/zionsecurity.gif'></td> </tr> </table> </body> </html>