Synology SSL VPN Client prior 1.4.7-0687 CGI buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Synology SSL VPN Client. This vulnerability affects unknown code of the component CGI. Executing a manipulation can lead to buffer overflow. The identification of this vulnerability is CVE-2023-5748. The attack can only be executed locally. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in Synology SSL VPN Client (Network Encryption Software). This vulnerability affects an unknown function of the component CGI. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect availability. CVE summarizes:

Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in cgi component in Synology SSL VPN Client before 1.4.7-0687 allows local users to conduct denial-of-service attacks via unspecified vectors.

The weakness was shared 10/25/2023 as SA_23_12. The advisory is available at synology.com. This vulnerability was named CVE-2023-5748 since 10/24/2023. The technical details are unknown and an exploit is not available.

Upgrading to version 1.4.7-0687 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 4.0

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

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 3.3
CNA Vector (Synology Inc.): 🔍

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
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: SSL VPN Client 1.4.7-0687

Timelineinfo

10/24/2023 🔍
10/25/2023 +1 days 🔍
10/25/2023 +0 days 🔍
11/16/2023 +22 days 🔍

Sourcesinfo

Vendor: synology.com

Advisory: SA_23_12
Status: Confirmed

CVE: CVE-2023-5748 (🔍)
GCVE (CVE): GCVE-0-2023-5748
GCVE (VulDB): GCVE-100-243334

Entryinfo

Created: 10/25/2023 12:18
Updated: 11/16/2023 08:24
Changes: 10/25/2023 12:18 (41), 11/16/2023 08:24 (21)
Complete: 🔍
Cache ID: 216::103

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