Synology DiskStation Manager 4.3-3810 file_delete.cgi path Delete path traversal

CVSS Meta Temp Score
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CTI Interest Score
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3.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Synology DiskStation Manager 4.3-3810. This issue affects some unknown processing of the file webapi/FileStation/file_delete.cgi. Performing a manipulation of the argument path with the input /test/../../etc/passwd as part of POST Request results in path traversal (Delete). This vulnerability is known as CVE-2013-6987. Furthermore, an exploit is available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Synology DiskStation Manager 4.3-3810 (Network Attached Storage Software). This affects an unknown functionality of the file webapi/FileStation/file_delete.cgi. The manipulation of the argument path with the input value /test/../../etc/passwd leads to a path traversal vulnerability (Delete). CWE is classifying the issue as 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. This is going to have an impact on availability. 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 published 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 public release has been coordinated with Synology. This vulnerability is uniquely identified as CVE-2013-6987 since 12/06/2013. It is possible to initiate the attack remotely. The successful exploitation needs a authentication. Technical details and a public exploit are known. MITRE ATT&CK project uses the attack technique T1006 for this issue. The advisory points out:

This kind of vulnerability allows any authenticated user, even if not administrative, to access, create, delete, modify system and configuration files. (…) Not tested all the CGI, but I guess that many others are vulnerable, so don't take my list as comprehensive.

A public exploit has been developed by Andrea Fabrizi in HTTP Request and been published immediately after the advisory. The exploit is shared for download 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 (101262†). Similar entries are available at VDB-11566, VDB-11567, VDB-11568 and VDB-11569. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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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
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Name: Delete
Class: Path traversal / Delete
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: 🔍

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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: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
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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-100-11565
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: 101262

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

Entryinfo

Created: 12/23/2013 19:30
Updated: 01/15/2025 02:39
Changes: 12/23/2013 19:30 (93), 04/30/2019 17:46 (1), 07/13/2024 00:27 (16), 01/15/2025 02:39 (2)
Complete: 🔍
Cache ID: 216:72D:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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