Denial of Service Vulnerability in OpenVPN by OpenVPN Technologies
CVE-2023-46849

7.5HIGH

Key Information:

Vendor
OpenVPN
Status
OpenVPN 2 (Community)
Access Server
Vendor
CVE Published:
11 November 2023

Summary

A vulnerability exists in OpenVPN versions 2.6.0 to 2.6.6 when using the --fragment option in certain configuration scenarios. This issue allows an attacker to exploit a divide by zero condition, potentially triggering application crashes and resulting in a denial of service. Users of the affected versions are encouraged to upgrade to the latest version to mitigate the risk associated with this vulnerability.

Affected Version(s)

Access Server Linux 2.11.0 <= 2.11.3

Access Server Linux 2.12.0 <= 2.12.1

OpenVPN 2 (Community) 2.6.0 <= 2.6.6

References

https://community.openvpn.net/openvpn/wiki/CVE-2023-46849
https://openvpn.net/security-advisory/access-server-secur...
https://www.debian.org/security/2023/dsa-5555

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.