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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| OpenVPN | OpenVPN 2 (Community) | >= 2.6.0, <= 2.6.6 |
| OpenVPN | Access Server | >= 2.11.0, <= 2.11.3; >= 2.12.0, <= 2.12.1 |
References
- https://community.openvpn.net/openvpn/wiki/CVE-2023-46849Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L3FS46ANNTAVLIQY56ZKGM5CBTRVBUNE/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O54I7D753V6PU6XBU26FEROD2DSHEJQ4/
- https://openvpn.net/security-advisory/access-server-security-update-cve-2023-46849-cve-2023-46850/Vendor Advisory
- https://www.debian.org/security/2023/dsa-5555Third Party Advisory
- https://community.openvpn.net/openvpn/wiki/CVE-2023-46849Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L3FS46ANNTAVLIQY56ZKGM5CBTRVBUNE/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O54I7D753V6PU6XBU26FEROD2DSHEJQ4/
- https://openvpn.net/security-advisory/access-server-security-update-cve-2023-46849-cve-2023-46850/Vendor Advisory
- https://www.debian.org/security/2023/dsa-5555Third Party Advisory
Timeline
- Published
- Nov 11, 2023
- Last modified
- Jun 17, 2026
- NVD status
- Modified