Multiple vulnerabilities in OpenVPN for Windows



Risk Low
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2024-5594
CVE-2024-4877
CVE-2024-28882
CWE-ID CWE-400
CWE-264
CWE-399
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 3 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU92937

Risk: Low

CVSSv4.0: 0.2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-5594

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to application accepts control channel messages with nonprintable characters. A remote peer can send garbage to openvpn log, or cause high CPU load.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenVPN for Windows: 2.6.0 - 2.6.10

CPE2.3 External links

https://github.com/OpenVPN/openvpn/releases/tag/v2.6.11


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU92936

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-4877

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly impose security restrictions on the service pipe. A local user with SeImpersonatePrivilege permissions can open the pipe a second time, tricking openvn GUI into providing user credentials (tokens), and gain full access to the account used by openvpn-gui.exe.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenVPN for Windows: 2.6.0 - 2.6.10

CPE2.3
External links

https://github.com/OpenVPN/openvpn/releases/tag/v2.6.11


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.

3) Resource management error

EUVDB-ID: #VU92938

Risk: Low

CVSSv4.0: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-28882

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to improper management of internal resources within the application. A remote authenticated client can make the server "keep the session" even when the server has been told to disconnect this client.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenVPN for Windows: 2.6.0 - 2.6.10

CPE2.3
External links

https://github.com/OpenVPN/openvpn/releases/tag/v2.6.11


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.



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