SB20240620213 - Multiple vulnerabilities in OpenVPN for Windows
Published: June 20, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Resource exhaustion (CVE-ID: CVE-2024-5594)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: 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
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.
2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2024-4877)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: 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
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.
3) Resource management error (CVE-ID: CVE-2024-28882)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: 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
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.
Remediation
Install update from vendor's website.