Hands-On System Programming with Linux

Test case 2

Write or buffer overflow on compile-time allocated memory. See the code snippet as follows:

/* test case 2 : out-of-bounds : write overflow [on compile-time memory] */static void write_overflow_compilemem(void){    int i, arr[5], tmp[8];    for (i=0; i<=5; i++) {       arr[i] = 100;  /* Bug: 'arr' overflows on i==5,                         overwriting part of the 'tmp' variable                         - a stack overflow! */    }}

This has caused a stack overflow (also referred to as a stack smashing or buffer overflow (BOF)) bug; it's a serious class of vulnerability that attackers have successfully exploited many a time, starting with the Morris Worm virus back in 1988! Check out the resources in the Further reading section for more on this vulnerability on the GitHub repository.

Very interestingly, ...