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Questions - buffer-overflow

Buffer Overflow in C with strtol

I'm trying to get the following C program to execute the win function by making use of a buffer overflow, however, I'm completely stuck as I cannot figure out the correct input. In this challenge, I w...
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goatw

c

buffer-overflow

ctf

Votes: 0

Answers: 1

Latest Answer

I don't see any buffer overflow here; you are just trying to pass the address of a function (which you know in advance) as input, convert the input into a valid address, and call such address like a n...
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Jack

Buffer overflow, pointing to the proper address but still not working

So I am trying to implement a buffer overflow to get shell access to a buggy machine. The machine is freebsd little endian byte reading String length is 200 which causes the overflow. Now after cons...
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aika

c

assembly

x86-64

buffer-overflow

exploit

Votes: 0

Answers: 0

How to overflow the result through inputs without editing code

#include <stdio.h> #include <string.h> char username[64], password[64], hostname[64]; int main(int argc, char **argv) { char result[256]; if (argc != 4 || ...
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user16439346

c

overflow

buffer-overflow

integer-overflow

dynamic-language-runtime

Votes: 0

Answers: 1

Latest Answer

Note that your size comparisons are off-by-one. strlen(argv[1]) > sizeof(username) || strlen(argv[2]) > sizeof(password) || strlen(argv[3]) > sizeof(hostname) In the event a string length is...
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Oka

can you identify any vulerabilty in this C code

Please can someone help me to look into this code and tell if there is a vulnerability? I'm new to the C language and also just started studying ethical hacking. If there is, can someone tell me the v...
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Wale Olokunola

c

x86

buffer-overflow

stack-memory

exploit

Votes: 0

Answers: 1

Latest Answer

There is a straightforward buffer overflow on the strcpy line in function2. If you provide a parameter longer than 20 characters, the stack will start to get overwritten and you will be able to set EI...
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Gabor Lengyel

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