{"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":"2026-03-09T01:17:49.193154Z","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":"0"},{"fixed":"2.4.9-r0"}]}],"versions":["2.0.9-r0","2.0.9-r1","2.0.9-r2","2.1.1-r0","2.1.1-r1","2.1.1-r2","2.1.3-r0","2.1.4-r0","2.1.4-r1","2.2.0-r0","2.2.0-r1","2.2.0-r2","2.2.2-r0","2.3.0-r0","2.3.1-r0","2.3.10-r0","2.3.10-r1","2.3.10-r2","2.3.11-r0","2.3.12-r0","2.3.12-r1","2.3.14-r0","2.3.2-r0","2.3.2-r1","2.3.2-r2","2.3.3-r0","2.3.4-r0","2.3.5-r0","2.3.6-r0","2.3.6-r1","2.3.7-r0","2.3.8-r0","2.3.8-r1","2.3.9-r0","2.4.0-r0","2.4.1-r0","2.4.1-r1","2.4.2-r0","2.4.3-r0","2.4.4-r0","2.4.4-r1","2.4.5-r0","2.4.5-r1","2.4.6-r0","2.4.6-r1","2.4.6-r2","2.4.6-r3","2.4.6-r4","2.4.6-r5","2.4.7-r0","2.4.7-r1","2.4.8-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":"0"},{"fixed":"2.4.9-r0"}]}],"versions":["2.0.9-r0","2.0.9-r1","2.0.9-r2","2.1.1-r0","2.1.1-r1","2.1.1-r2","2.1.3-r0","2.1.4-r0","2.1.4-r1","2.2.0-r0","2.2.0-r1","2.2.0-r2","2.2.2-r0","2.3.0-r0","2.3.1-r0","2.3.10-r0","2.3.10-r1","2.3.10-r2","2.3.11-r0","2.3.12-r0","2.3.12-r1","2.3.14-r0","2.3.2-r0","2.3.2-r1","2.3.2-r2","2.3.3-r0","2.3.4-r0","2.3.5-r0","2.3.6-r0","2.3.6-r1","2.3.7-r0","2.3.8-r0","2.3.8-r1","2.3.9-r0","2.4.0-r0","2.4.1-r0","2.4.1-r1","2.4.2-r0","2.4.3-r0","2.4.4-r0","2.4.4-r1","2.4.5-r0","2.4.5-r1","2.4.6-r0","2.4.6-r1","2.4.6-r2","2.4.6-r3","2.4.6-r4","2.4.6-r5","2.4.7-r0","2.4.7-r1","2.4.8-r0","2.4.8-r1"],"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":"0"},{"fixed":"2.4.9-r0"}]}],"versions":["2.0.9-r0","2.0.9-r1","2.0.9-r2","2.1.1-r0","2.1.1-r1","2.1.1-r2","2.1.3-r0","2.1.4-r0","2.1.4-r1","2.2.0-r0","2.2.0-r1","2.2.0-r2","2.2.2-r0","2.3.0-r0","2.3.1-r0","2.3.10-r0","2.3.10-r1","2.3.10-r2","2.3.11-r0","2.3.12-r0","2.3.12-r1","2.3.14-r0","2.3.2-r0","2.3.2-r1","2.3.2-r2","2.3.3-r0","2.3.4-r0","2.3.5-r0","2.3.6-r0","2.3.6-r1","2.3.7-r0","2.3.8-r0","2.3.8-r1","2.3.9-r0","2.4.0-r0","2.4.1-r0","2.4.1-r1","2.4.2-r0","2.4.3-r0","2.4.4-r0","2.4.4-r1","2.4.5-r0","2.4.5-r1","2.4.6-r0","2.4.6-r1","2.4.6-r2","2.4.6-r3","2.4.6-r4","2.4.6-r5","2.4.7-r0","2.4.7-r1","2.4.8-r0","2.4.8-r1","2.4.8-r2","2.4.8-r3","2.4.8-r4"],"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":"0"},{"fixed":"2.4.9-r0"}]}],"versions":["2.0.9-r0","2.0.9-r1","2.0.9-r2","2.1.1-r0","2.1.1-r1","2.1.1-r2","2.1.3-r0","2.1.4-r0","2.1.4-r1","2.2.0-r0","2.2.0-r1","2.2.0-r2","2.2.2-r0","2.3.0-r0","2.3.1-r0","2.3.10-r0","2.3.10-r1","2.3.10-r2","2.3.11-r0","2.3.12-r0","2.3.12-r1","2.3.14-r0","2.3.2-r0","2.3.2-r1","2.3.2-r2","2.3.3-r0","2.3.4-r0","2.3.5-r0","2.3.6-r0","2.3.6-r1","2.3.7-r0","2.3.8-r0","2.3.8-r1","2.3.9-r0","2.4.0-r0","2.4.1-r0","2.4.1-r1","2.4.2-r0","2.4.3-r0","2.4.4-r0","2.4.4-r1","2.4.5-r0","2.4.5-r1","2.4.6-r0","2.4.6-r1","2.4.6-r2","2.4.6-r3","2.4.6-r4","2.4.6-r5","2.4.7-r0","2.4.7-r1","2.4.8-r0","2.4.8-r1","2.4.8-r2","2.4.8-r3","2.4.8-r4"],"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":"0"},{"fixed":"2.4.9-r0"}]}],"versions":["2.0.9-r0","2.0.9-r1","2.0.9-r2","2.1.1-r0","2.1.1-r1","2.1.1-r2","2.1.3-r0","2.1.4-r0","2.1.4-r1","2.2.0-r0","2.2.0-r1","2.2.0-r2","2.2.2-r0","2.3.0-r0","2.3.1-r0","2.3.10-r0","2.3.10-r1","2.3.10-r2","2.3.11-r0","2.3.12-r0","2.3.12-r1","2.3.14-r0","2.3.2-r0","2.3.2-r1","2.3.2-r2","2.3.3-r0","2.3.4-r0","2.3.5-r0","2.3.6-r0","2.3.6-r1","2.3.7-r0","2.3.8-r0","2.3.8-r1","2.3.9-r0","2.4.0-r0","2.4.1-r0","2.4.1-r1","2.4.2-r0","2.4.3-r0","2.4.4-r0","2.4.4-r1","2.4.5-r0","2.4.5-r1","2.4.6-r0","2.4.6-r1","2.4.6-r2","2.4.6-r3","2.4.6-r4","2.4.6-r5","2.4.7-r0","2.4.7-r1","2.4.8-r0","2.4.8-r1","2.4.8-r2","2.4.8-r3","2.4.8-r4"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-11810.json"}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