Synology DiskStation Manager 4.3-3810 file_rename.cgi Rename 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 has been found in Synology DiskStation Manager 4.3-3810 and classified as critical. The affected element is an unknown function of the file webapi/FileStation/file_rename.cgi. The manipulation leads to path traversal (Rename). This vulnerability is uniquely identified as CVE-2013-6987. Moreover, an exploit is present. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Synology DiskStation Manager 4.3-3810 (Network Attached Storage Software). This issue affects an unknown part of the file webapi/FileStation/file_rename.cgi. The manipulation with an unknown input leads to a path traversal vulnerability (Rename). Using CWE to declare the problem leads to 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. Impacted is 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 disclosed 12/20/2013 by Andrea Fabrizi with andreafabrizi.it as Synology DSM multiple directory traversal as confirmed mailinglist post (Full-Disclosure). It is possible to read the advisory at seclists.org. The public release has been coordinated in cooperation with Synology. The identification of this vulnerability is CVE-2013-6987 since 12/06/2013. The attack may be initiated remotely. A simple authentication is necessary for exploitation. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

A public exploit has been developed by Andrea Fabrizi in HTTP Request and been published immediately after the advisory. The exploit is available 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 (101264†). The entries VDB-11565, VDB-11566, VDB-11568 and VDB-11569 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

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: Rename
Class: Path traversal / Rename
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: 🔍
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-100-11567
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: 101264

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 (89), 05/01/2019 09:12 (1), 07/13/2024 17:39 (16), 01/15/2025 02:39 (1)
Complete: 🔍
Cache ID: 216::103

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