VDB-75623 · CVE-2015-2851 · VU#551972

Synology Cloud Station up to 1.1-2291 on Mac OS X Sync Client client_chown access control

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.
7.8	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Synology Cloud Station up to 1.1-2291 on Mac OS X. This impacts the function client_chown of the component Sync Client. The manipulation leads to access control. This vulnerability is listed as CVE-2015-2851. There is no available exploit.

Detailsinfo

A vulnerability was found in Synology Cloud Station up to 1.1-2291 on Mac OS X (Cloud Software) and classified as critical. This issue affects the function client_chown of the component Sync Client. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

client_chown in the sync client in Synology Cloud Station 1.1-2291 through 3.1-3320 on OS X allows local users to change the ownership of arbitrary files, and consequently obtain root access, by specifying a filename.

The weakness was presented 05/30/2015 (Website). It is possible to read the advisory at kb.cert.org. The identification of this vulnerability is CVE-2015-2851 since 04/03/2015. Attacking locally is a requirement. A simple authentication is required for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 74826†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Cloud Software

Vendor

Synology

Name

Cloud Station

Version

1.1-2291

License

commercial

Website

Vendor: https://www.synology.com/

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.8
VulDB Temp Score: 7.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/03/2015 🔍
05/26/2015 +53 days 🔍
05/30/2015 +4 days 🔍
05/30/2015 +0 days 🔍
05/31/2015 +1 days 🔍
11/05/2024 +3446 days 🔍

Sourcesinfo

Vendor: synology.com

Advisory: kb.cert.org
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-2851 (🔍)
GCVE (CVE): GCVE-0-2015-2851
GCVE (VulDB): GCVE-100-75623
CERT: 🔍
SecurityFocus: 74826 - Synology Cloud Station sync client CVE-2015-2851 Local Privilege Escalation Vulnerability

Entryinfo

Created: 05/31/2015 14:35
Updated: 11/05/2024 22:31
Changes: 05/31/2015 14:35 (52), 04/01/2019 07:45 (3), 11/05/2024 22:31 (17)
Complete: 🔍
Cache ID: 216::103