VDB
ALPINE-CVE-2020-11810
ALPINE-CVE-2020-11810
PUBLISHED
CVSS 3.700000047683716 LOW
An issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can inject a data channel v2 (P_DATA_V2) packet using a victim's peer-id. Normally such packets are dropped, but if this packet arrives before the data channel crypto parameters have been initialized, the victim's connection will be dropped. This requires careful timing due to the small time window (usually within a few seconds) between the victim client connection starting and the server PUSH_REPLY response back to the client. This attack will only work if Negotiable Cipher Parameters (NCP) is in use.
Risk Scores
CVSS v3.1
3.700000047683716
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.13 | openvpn | 2.4.8-r4, 0, 2.0.9-r0 |
| Alpine:v3.10 | openvpn | 2.4.8-r0, 2.0.9-r1, 2.0.9-r2 |
| Alpine:v3.21 | openvpn | 0, 2.3.5-r0, 2.3.6-r0 |
| Alpine:v3.17 | openvpn | 2.0.9-r0, 0, 2.0.9-r1 |
| Alpine:v3.20 | openvpn | 2.4.8-r4, 0, 2.0.9-r0 |
| Alpine:v3.16 | openvpn | 0, 2.4.8-r4, 2.4.8-r3 |
| Alpine:v3.12 | openvpn | 2.4.8-r4, 0, 2.4.8-r3 |
| Alpine:v3.18 | openvpn | 2.4.8-r4, 2.0.9-r0, 2.0.9-r1 |
| Alpine:v3.23 | openvpn | 2.0.9-r0, 2.0.9-r1, 2.0.9-r2 |
| Alpine:v3.19 | openvpn | 2.4.8-r3, 2.4.8-r4, 0 |
| Alpine:v3.22 | openvpn | 2.1.1-r1, 0, 2.0.9-r0 |
| Alpine:v3.14 | openvpn | 2.4.8-r4, 0, 2.0.9-r0 |
| Alpine:v3.11 | openvpn | 2.4.8-r1, 2.0.9-r1, 2.0.9-r2 |
| Alpine:v3.15 | openvpn | 2.3.0-r0, 2.3.1-r0, 2.3.10-r0 |
Timeline
- Apr 27, 2020 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch