Synology DiskStation Manager 4.3-3810 file_MVCP.cgi path traversal
| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 5.7 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, was found in Synology DiskStation Manager 4.3-3810 (Network Attached Storage Software). Affected is an unknown code of the file webapi/FileStation/file_MVCP.cgi. The manipulation with an unknown input leads to a path traversal vulnerability. 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 confidentiality, integrity, and availability. CVE summarizes:
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 presented 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 for download at seclists.org. The public release was coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2013-6987 since 12/06/2013. It is possible to launch the attack remotely. A authentication is needed for exploitation. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1006.
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), Tenable (72346) and Exploit-DB (30475). See 11565, 11566, 11567 and 11569 for similar entries.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 6.3VulDB Meta Temp Score: 5.7
VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
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| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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Exploiting
Class: Path traversalCWE: CWE-22
ATT&CK: T1006
Local: No
Remote: Yes
Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Andrea Fabrizi
Programming Language: 🔍
Download: 🔍
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| 0-Day | unlock | unlock | unlock | unlock |
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| Today | unlock | unlock | unlock | unlock |
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 Intelligence
Interest: 🔍Active Actors: 🔍
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Countermeasures
Recommended: PatchStatus: 🔍
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0-Day Time: 🔍
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Timeline
12/05/2013 🔍12/06/2013 🔍
12/20/2013 🔍
12/20/2013 🔍
12/20/2013 🔍
12/20/2013 🔍
12/23/2013 🔍
12/24/2013 🔍
12/30/2013 🔍
12/31/2013 🔍
02/05/2014 🔍
04/30/2019 🔍
Sources
Vendor: synology.comAdvisory: Synology DSM multiple directory traversal
Researcher: Andrea Fabrizi
Organization: andreafabrizi.it
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍
CVE: CVE-2013-6987 (🔍)
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: 101265
scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍
Entry
Created: 12/23/2013 19:33Updated: 04/30/2019 23:38
Changes: 12/23/2013 19:33 (88), 04/30/2019 23:38 (1)
Complete: 🔍
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