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Vulnerability · Published Nov 11, 2023 · Assigned by OpenVPN

CVE-2023-46849

High 7.5

In plain English

A high-severity security flaw in Access Server from OpenVPN. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 67% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.1%top 33.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20openvpn2.6.7-r0ALPINE-CVE-2023-46849
Alpine:v3.21openvpn2.6.7-r0ALPINE-CVE-2023-46849
Alpine:v3.22openvpn2.6.7-r0ALPINE-CVE-2023-46849
Alpine:v3.23openvpn2.6.7-r0ALPINE-CVE-2023-46849
Alpine:v3.24openvpn2.6.7-r0ALPINE-CVE-2023-46849
Debian:12openvpn2.6.3-1+deb12u2DEBIAN-CVE-2023-46849
Debian:12openvpn2.6.3-1+deb12u2DSA-5555-1
Debian:13openvpn2.6.7-1DEBIAN-CVE-2023-46849
Debian:14openvpn2.6.7-1DEBIAN-CVE-2023-46849
Ubuntu:22.04:LTSopenvpn2.5.5-1ubuntu3.1UBUNTU-CVE-2023-46849

Affected products (as reported)

VendorProductVersions
OpenVPN OpenVPN 2 (Community) 2.6.0 – through 2.6.6
OpenVPN Access Server 2.11.0 – through 2.11.32.12.0 – through 2.12.1

Weakness: CWE-369 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References