Continuing with the “Net” series of Protostar, is Net 1. We are given the following code: #include "../common/common.c" #define NAME "net1" #define UID 998 #define GID 998 #define PORT 2998 void run() { char buf[12]; char fub[12]; char *q; unsigned int wanted; wanted = …

I recently started looking at the “Net” problems in Protostar, and found them to be quite a fun change in pace. Starting with Net 0, we are given the following code: #include "../common/common.c" #define NAME "net0" #define UID 999 #define GID 999 #define PORT 2999 void …

Since I’ve been doing a lot of the format string exploits lately, I decided to do the Final 1 challenge. We start out the challenge by being given the following code: #include "../common/common.c" #include <syslog.h> #define NAME "final1" #define UID 0 #define GID 0 …

Next up is the last challenge in the Format String series, Format 4. It starts out with the following code: #include <stdlib.h> #include <unistd.h> #include <stdio.h> #include <string.h> int target; void hello() { printf("code execution redirected! you win\n"); …

Continuing in the String Format section, the next challenge we run across is Format 3. We’re first given the following code: #include <stdlib.h> #include <unistd.h> #include <stdio.h> #include <string.h> int target; void printbuffer(char *string) { printf(string); } …

Continuing from where we left off, we arrive at Format 2. It presents us with the following code: #include <stdlib.h> #include <unistd.h> #include <stdio.h> #include <string.h> int target; void vuln() { char buffer[512]; fgets(buffer, sizeof(buffer), stdin); printf(buffer); …