Synology DiskStation Manager up to 6.2.3-25423 Kernel 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 (≈)
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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.
6.0$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Synology DiskStation Manager. The affected element is an unknown function of the component Kernel Module Handler. Performing a manipulation results in access control. This vulnerability is reported as CVE-2021-26563. The attack requires a local approach. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Synology DiskStation Manager (Network Attached Storage Software). This affects an unknown code of the component Kernel Module Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality.

The weakness was disclosed 02/27/2021 as SA_20_26. The advisory is shared at synology.com. This vulnerability is uniquely identified as CVE-2021-26563. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 6.2.3-25426-3 eliminates this vulnerability.

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

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.7
NVD Vector: 🔍

CNA Base Score: 8.2
CNA Vector (Synology Inc.): 🔍

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-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: DiskStation Manager 6.2.3-25426-3

Timelineinfo

02/02/2021 🔍
02/27/2021 +25 days 🔍
02/27/2021 +0 days 🔍
01/15/2025 +1418 days 🔍

Sourcesinfo

Vendor: synology.com

Advisory: SA_20_26
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-26563 (🔍)
GCVE (CVE): GCVE-0-2021-26563
GCVE (VulDB): GCVE-100-170517

Entryinfo

Created: 02/27/2021 08:17
Updated: 01/15/2025 07:16
Changes: 02/27/2021 08:17 (39), 03/05/2021 20:56 (6), 03/05/2021 20:59 (1), 03/14/2021 07:12 (18), 01/15/2025 07:16 (33)
Complete: 🔍
Cache ID: 216::103

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