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FreeBSD : openvpn -- too long a username or password from a client can confuse openvpn servers (47bc292a-d472-11ef-aaab-7d43732cb6f5)

high Nessus Plugin ID 214337

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 47bc292a-d472-11ef-aaab-7d43732cb6f5 advisory.

 Frank Lichtenheld reports:
 [OpenVPN v2.6.13 ...] improve server-side handling of clients sending usernames or passwords longer than USER_PASS_LEN - this would not result in a crash, buffer overflow or other security issues, but the server would then misparse incoming IV variables and produce misleading error messages.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

See Also

https://github.com/OpenVPN/openvpn/releases/tag/v2.6.13

http://www.nessus.org/u?8a9e4c4f

Plugin Details

Severity: High

ID: 214337

File Name: freebsd_pkg_47bc292ad47211efaaab7d43732cb6f5.nasl

Version: 1.1

Type: local

Published: 1/17/2025

Updated: 1/17/2025

Supported Sensors: Nessus

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:openvpn

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 1/17/2025

Vulnerability Publication Date: 10/28/2024