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©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); }
![©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); }](http://images.slideplayer.com/1/3726/slides/slide_1.jpg "©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); }")
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©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory............ Fill Direction Value to Change
![©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory](http://images.slideplayer.com/1/3726/slides/slide_2.jpg "Fill Direction Value to Change.")
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©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x............ Fill Direction Buffer (100 char) Value to Change
![©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x](http://images.slideplayer.com/1/3726/slides/slide_3.jpg "Fill Direction Buffer (100 char) Value to Change.")
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©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer............ Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer Value to Change
![©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer](http://images.slideplayer.com/1/3726/slides/slide_4.jpg "Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer Value to Change.")
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©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer............ Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%d%n Value to Change
![©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer](http://images.slideplayer.com/1/3726/slides/slide_5.jpg "Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%d%n Value to Change.")
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©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer............ Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%d%n c0faffbf Value to Change
![©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer](http://images.slideplayer.com/1/3726/slides/slide_6.jpg "Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%d%n c0faffbf Value to Change.")
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©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer............ Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%d%n c0faffbf value of x Value to Change
![©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer](http://images.slideplayer.com/1/3726/slides/slide_7.jpg "Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%d%n c0faffbf value of x Value to Change.")
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©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer............ Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%d%n c0faffbf value of x Value to Change
![©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer](http://images.slideplayer.com/1/3726/slides/slide_8.jpg "Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%d%n c0faffbf value of x Value to Change.")
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©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer............ Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%d%n c0faffbf value of x 5
![©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer](http://images.slideplayer.com/1/3726/slides/slide_9.jpg "Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%d%n c0faffbf value of x 5.")
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©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer............ Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%.255d%n c0faffbf value of x 259
![©2002, Ed Skoudis Format String Stack View main() { char user_input[100]; char buffer[100]; int x; … /*get user_input*/ … snprintf(buffer, sizeof buffer, user_input); } Top of Memory Bottom of Memory int x Return Pointer](http://images.slideplayer.com/1/3726/slides/slide_10.jpg "Fill Direction Buffer (100 char) Pointer to user_input sizeof buffer Pointer to Buffer c0faffbf%.255d%n c0faffbf value of x 259.")
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