VDB-75623 · CVE-2015-2851 · BID 74826

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

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.8$0-$5k0.00

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.

Productinfo

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Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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 🔍
04/01/2019 +1401 days 🔍

Sourcesinfo

Vendor: synology.com

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

CVE: CVE-2015-2851 (🔍)
SecurityFocus: 74826 - Synology Cloud Station sync client CVE-2015-2851 Local Privilege Escalation Vulnerability

Entryinfo

Created: 05/31/2015 14:35
Updated: 04/01/2019 07:45
Changes: 05/31/2015 14:35 (52), 04/01/2019 07:45 (3)
Complete: 🔍

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