Description
OpenVPN before 2.0.1, when running in "dev tap" Ethernet bridging mode, allows remote authenticated clients to cause a denial of service (memory exhaustion) via a flood of packets with a large number of spoofed MAC addresses.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openvpn | 2.0.2-1 | — |
| Debian 13 | openvpn | 2.0.2-1 | — |
| Debian 12 | openvpn | 2.0.2-1 | — |
| Debian 3.1 | openvpn | 2.0-1sarge1 | DSA-851-1 |
Advisories 1
- DSA-851-1 openvpn - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
References
- 17103 third-party-advisory
- http://openvpn.net/changelog.html
- MDKSA-2005:145 vendor-advisory
- DSA-851 vendor-advisory
- 16463 third-party-advisory