Synology DiskStation Manager up to 6.2.3-25423 Web Request iscsi_snapshot_comm_core use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Synology DiskStation Manager. This vulnerability affects the function iscsi_snapshot_comm_core of the component Web Request Handler. Performing a manipulation results in use after free. This vulnerability is reported as CVE-2021-27646. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Synology DiskStation Manager (Network Attached Storage Software). This affects the function iscsi_snapshot_comm_core of the component Web Request Handler. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 03/12/2021 as SA_20_26. It is possible to read the advisory at synology.com. This vulnerability is uniquely identified as CVE-2021-27646. Technical details of the vulnerability are known, but there is no available exploit.

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.0
VulDB Meta Temp Score: 8.9

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 9.8
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: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

02/24/2021 🔍
03/12/2021 +16 days 🔍
03/12/2021 +0 days 🔍
01/15/2025 +1405 days 🔍

Sourcesinfo

Vendor: synology.com

Advisory: SA_20_26
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-27646 (🔍)
GCVE (CVE): GCVE-0-2021-27646
GCVE (VulDB): GCVE-100-171207

Entryinfo

Created: 03/12/2021 13:39
Updated: 01/15/2025 07:16
Changes: 03/12/2021 13:39 (40), 04/01/2021 00:02 (6), 04/01/2021 00:09 (8), 01/15/2025 07:16 (36)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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