Multiple vulnerabilities in OpenVPN server for Windows



| Updated: 2024-03-25
Risk Medium
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2024-27459
CVE-2024-24974
CVE-2024-27903
CVE-2024-1305
CWE-ID CWE-121
CWE-284
CWE-426
CWE-190
Exploitation vector Network
Public exploit N/A
Vulnerable software
 OpenVPN for Windows
Client/Desktop applications / Software for system administration

Vendor OpenVPN

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Stack-based buffer overflow

EUVDB-ID: #VU87675

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-27459

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the interactive service component. A local user can trigger a stack-based buffer overflow and execute arbitrary code with elevated privileges.

The vulnerability affects Windows installations only.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenVPN for Windows: 2.0 - 2.6.9

CPE2.3 External links

https://github.com/OpenVPN/openvpn/releases/tag/v2.6.10
https://github.com/OpenVPN/openvpn/releases/tag/v2.5.10


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper access control

EUVDB-ID: #VU87676

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-24974

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

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

The vulnerability exists due to improper access restrictions to the interactive service pipe. A remote user can bypass implemented security restrictions and gain unauthorized access to the application.

The vulnerability affects Windows installations only.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenVPN for Windows: 2.0 - 2.6.9

CPE2.3 External links

https://github.com/OpenVPN/openvpn/releases/tag/v2.6.10
https://github.com/OpenVPN/openvpn/releases/tag/v2.5.10


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Untrusted search path

EUVDB-ID: #VU87677

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-27903

CWE-ID: CWE-426 - Untrusted Search Path

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to usage of an untrusted search path in plugins. A local user can place a malicious binary into a specific location on the system and execute arbitrary code with escalated privileges.

The vulnerability affects Windows installations only.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenVPN for Windows: 2.0 - 2.6.9

CPE2.3 External links

https://github.com/OpenVPN/openvpn/releases/tag/v2.6.10
https://github.com/OpenVPN/openvpn/releases/tag/v2.5.10


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Integer overflow

EUVDB-ID: #VU87678

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-1305

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow in !TapSharedSendPacket within the Windows TAP driver. A local user can trigger integer overflow and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenVPN for Windows: 2.0 - 2.6.9

CPE2.3 External links

https://github.com/OpenVPN/openvpn/releases/tag/v2.6.10
https://github.com/OpenVPN/openvpn/releases/tag/v2.5.10


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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