{"id":"ALPINE-CVE-2020-11810","details":"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.","modified":"2026-08-20T10:18:02.545050503Z","published":"2020-04-27T15:15:12.407Z","upstream":["CVE-2020-11810"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2020-11810"}],"affected":[{"package":{"name":"openvpn","ecosystem":"Alpine:v3.10","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/openvpn?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}},{"package":{"name":"openvpn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