Synology DiskStation Manager 4.3-3810 file_share.cgi folder_path File Listing path traversal

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Synology DiskStation Manager 4.3-3810. It has been classified as critical. This affects an unknown function of the file webapi/FileStation/file_share.cgi. This manipulation of the argument folder_path with the input /test/../../tmp causes path traversal (File Listing). The identification of this vulnerability is CVE-2013-6987. Furthermore, there is an exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability has been found in Synology DiskStation Manager 4.3-3810 (Network Attached Storage Software) and classified as problematic. Affected by this vulnerability is an unknown code block of the file webapi/FileStation/file_share.cgi. The manipulation of the argument folder_path with the input value /test/../../tmp leads to a path traversal vulnerability (File Listing). The CWE definition for the vulnerability is CWE-22. 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. As an impact it is known to affect confidentiality. The summary by CVE is:

Multiple directory traversal vulnerabilities in the FileBrowser components in Synology DiskStation Manager (DSM) before 4.3-3810 Update 3 allow remote attackers to read, write, and delete arbitrary files via a .. (dot dot) in the (1) path parameter to file_delete.cgi or (2) folder_path parameter to file_share.cgi in webapi/FileStation/; (3) dlink parameter to fbdownload/; or unspecified parameters to (4) html5_upload.cgi, (5) file_download.cgi, (6) file_sharing.cgi, (7) file_MVCP.cgi, or (8) file_rename.cgi in webapi/FileStation/.

The weakness was shared 12/20/2013 by Andrea Fabrizi with andreafabrizi.it as Synology DSM multiple directory traversal as confirmed mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. The vendor cooperated in the coordination of the public release. This vulnerability is known as CVE-2013-6987 since 12/06/2013. The attack can be launched remotely. The requirement for exploitation is a single authentication. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1006 for this issue.

A public exploit has been developed by Andrea Fabrizi in HTTP Request and been published immediately after the advisory. It is possible to download the exploit at seclists.org. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 15 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 72346 (Synology DiskStation Manager < 4.3-3810 Update 3 Multiple FileBrowser Component Directory Traversal Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The advisory illustrates:

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.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (89892), Exploit-DB (30475), Tenable (72346), SecurityFocus (BID 64483†) and OSVDB (101266†). The entries VDB-11565, VDB-11566, VDB-11567 and VDB-11568 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: File Listing
Class: Path traversal / File Listing
CWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Andrea Fabrizi
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 72346
Nessus Name: Synology DiskStation Manager < 4.3-3810 Update 3 Multiple FileBrowser Component Directory Traversal Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

12/05/2013 🔍
12/06/2013 +1 days 🔍
12/20/2013 +14 days 🔍
12/20/2013 +0 days 🔍
12/20/2013 +0 days 🔍
12/20/2013 +0 days 🔍
12/23/2013 +3 days 🔍
12/24/2013 +1 days 🔍
12/30/2013 +6 days 🔍
12/31/2013 +1 days 🔍
02/05/2014 +36 days 🔍
01/15/2025 +3997 days 🔍

Sourcesinfo

Vendor: synology.com

Advisory: Synology DSM multiple directory traversal
Researcher: Andrea Fabrizi
Organization: andreafabrizi.it
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-6987 (🔍)
GCVE (CVE): GCVE-0-2013-6987
GCVE (VulDB): GCVE-100-11569
X-Force: 89892 - Synology DiskStation Manager (DSM) multiple scripts directory traversal
SecurityFocus: 64483 - Synology DiskStation Manager 'FileBrowser' Component Multiple Directory Traversal Vulnerabilities
Secunia: 56106 - Synology DiskStation Manager Multiple Security Bypass Vulnerabilities, Not Critical
OSVDB: 101266

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 12/23/2013 19:33
Updated: 01/15/2025 02:39
Changes: 12/23/2013 19:33 (91), 04/29/2019 16:29 (1), 07/13/2024 23:31 (16), 01/15/2025 02:39 (2)
Complete: 🔍
Cache ID: 216:457:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!