SB2023070308 - Multiple vulnerabilities in SoftEther VPN

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Main Vulnerability Database SB2023070308

SB2023070308 - Multiple vulnerabilities in SoftEther VPN

Published: July 3, 2023

Security Bulletin ID SB2023070308
CSH Severity
High
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 17% Medium 67% Low 17%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 vulnerabilities.


1) Heap-based buffer overflow (CVE-ID: CVE-2023-27395)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the DDNS client functionality. A remote attacker can perform a man-in-the-middle attack, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


2) Integer overflow (CVE-ID: CVE-2023-22325)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to integer overflow in the dynamic DNS (DDNS) client function. A remote attacker can perform a man-in-the-middle attack, trigger integer overflow and cause a denial of service condition on the target system.


3) Exposure of Resource to Wrong Sphere (CVE-ID: CVE-2023-32275)

CWE-ID: CWE-668 - Exposure of resource to wrong sphere

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to compromise the system.

The vulnerability exists due to exposure of resource to wrong sphere. A local administrator can obtain the starting address of a heap region.


4) Improper access control (CVE-ID: CVE-2023-27516)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions. A remote attacker can make an administrative connection if the remote administration feature is accidentally enabled without the password being set.


5) Man-in-the-Middle (MitM) attack (CVE-ID: CVE-2023-32634)

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.

The vulnerability exists due to using insecure protocols. A remote attacker can perform a man-in-the-middle attack on communication between the administrator and the VPN Client process.


6) Use of uninitialized resource (CVE-ID: CVE-2023-31192)

CWE-ID: CWE-908 - Use of Uninitialized Resource

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to usage of uninitialized resources. A remote user can send a specially crafted packet to the VPN Client, trigger uninitialized usage of resources and obtain an uninitialized stack space value in the VPN Client process.


Remediation

Install update from vendor's website.

References