Resource exhaustion in OpenVPN for Windows - CVE-2024-5594

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Main Vulnerability Database Vulnerabilities #VU92937

Resource exhaustion in OpenVPN for Windows - CVE-2024-5594

Published: June 20, 2024


Vulnerability identifier: #VU92937
CSH Severity: Low
CVSS v4: 1.8 [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]
CVE-ID: CVE-2024-5594
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

OpenVPN for Windows
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Manager Server
SUSE Manager Proxy
SUSE Manager Retail Branch Server
Fedora
Ubuntu
Basesystem Module
openSUSE Leap
openEuler
openvpn (Ubuntu package)
openvpn-debuginfo
openvpn-auth-pam-plugin-debuginfo
openvpn-debugsource
openvpn-auth-pam-plugin
openvpn
openvpn-help
openvpn-devel
openvpn-down-root-plugin-debuginfo
openvpn-down-root-plugin
openvpn-dco-devel
openvpn-dco-debuginfo
openvpn-dco-debugsource
openvpn-dco
SINEMA Remote Connect Server

How to mitigate CVE-2024-5594

Install updates from vendor's website.

OpenVPN for Windows - update to 2.6.11
openvpn (Ubuntu package) - addressed in versions Ubuntu Pro, 2.4.12-0ubuntu0.20.04.2, 2.5.9-0ubuntu0.22.04.3, 2.6.5-0ubuntu1.2, 2.6.9-1ubuntu4.1
openvpn-debuginfo - addressed in versions 2.3.8-16.35.1, 2.5.6-150400.3.9.1, 2.6.8-150600.3.14.1
openvpn-auth-pam-plugin-debuginfo - addressed in versions 2.3.8-16.35.1, 2.5.6-150400.3.9.1, 2.6.8-150600.3.14.1
openvpn-debugsource - addressed in versions 2.3.8-16.35.1, 2.5.6-150400.3.9.1, 2.6.8-150600.3.14.1
openvpn-auth-pam-plugin - addressed in versions 2.3.8-16.35.1, 2.5.6-150400.3.9.1, 2.6.8-150600.3.14.1
openvpn - addressed in versions 2.3.8-16.35.1, 2.5.6-150400.3.9.1, 2.6.8-150600.3.14.1
openvpn-help - update to 2.5.5-4
openvpn-devel - update to 2.5.5-4
openvpn-debugsource - update to 2.5.5-4
openvpn-debuginfo - update to 2.5.5-4
openvpn - update to 2.5.5-4
openvpn-down-root-plugin-debuginfo - addressed in versions 2.5.6-150400.3.9.1, 2.6.8-150600.3.14.1
openvpn-devel - addressed in versions 2.5.6-150400.3.9.1, 2.6.8-150600.3.14.1
openvpn-down-root-plugin - addressed in versions 2.5.6-150400.3.9.1, 2.6.8-150600.3.14.1
openvpn - addressed in versions 2.5.11-1.el9, 2.6.11-1.fc40
openvpn-dco-devel - update to 2.6.8-150600.3.14.1
openvpn-dco-debuginfo - update to 2.6.8-150600.3.14.1
openvpn-dco-debugsource - update to 2.6.8-150600.3.14.1
openvpn-dco - update to 2.6.8-150600.3.14.1
SINEMA Remote Connect Server - update to 3.2 SP3

External References

Related Security Bulletins