{"id":"CVE-2020-11810","aliases":["ALPINE-CVE-2020-11810","DEBIAN-CVE-2020-11810","DLA-2992-1","EUVD-2020-4152","GHSA-6crj-vqv7-qq9r","MGASA-2020-0195","OESA-2021-1064","SUSE-SU-2021:1577-1","UBUNTU-CVE-2020-11810","USN-4933-1","openSUSE-SU-2021:0734-1","openSUSE-SU-2024:11128-1"],"status":"published","title":"An issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can inject a data channel v2 ...","description":"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.","severity":{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.0165,"percentile":0.76856,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362"],"published":"2020-04-27T14:47:01Z","modified":"2026-10-26T12:01:24Z","fixes":[{"ecosystem":"Alpine:v3.10","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.11","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"openvpn","fixed_in":["2.4.9-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"openvpn","fixed_in":["2.4.9-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"openvpn","fixed_in":["2.4.9-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"openvpn","fixed_in":["2.4.9-1"],"sources":["osv"]},{"ecosystem":"Mageia:7","package":"openvpn","fixed_in":["2.4.9-1.mga7"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS","package":"openvpn","fixed_in":["2.4.8-6.oe1"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP1","package":"openvpn","fixed_in":["2.4.8-6.oe1"],"sources":["osv"]},{"ecosystem":"Ubuntu:18.04:LTS","package":"openvpn","fixed_in":["2.4.4-2ubuntu1.5"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"openvpn","fixed_in":["2.4.7-1ubuntu2.20.04.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.10","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.11","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.12","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.13","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.14","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.15","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.16","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.4.0"},{"fixed":"2.4.9-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.9-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.9-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.9-1"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.0-6+deb9u4"}]}],"versions":["2.4.0-6","2.4.0-6+deb9u1","2.4.0-6+deb9u1~bpo8+1","2.4.0-6+deb9u2","2.4.0-6+deb9u3"],"bundled":4},{"source":"osv","ecosystem":"Mageia:7","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.9-1.mga7"}]}]},{"source":"osv","ecosystem":"openEuler:20.03-LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.8-6.oe1"}]}]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP1","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.8-6.oe1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP2","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.3-5.7.1"}]}],"bundled":3},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP3","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.3-5.7.1"}]}],"bundled":3},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.4-2ubuntu1.5"}]}],"versions":["2.4.3-4ubuntu1","2.4.4-1ubuntu1","2.4.4-2ubuntu1","2.4.4-2ubuntu1.1","2.4.4-2ubuntu1.2","2.4.4-2ubuntu1.3"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.7-1ubuntu2.20.04.2"}]}],"versions":["2.4.7-1ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.4-2ubuntu1.5"}]}],"versions":["2.4.3-4ubuntu1","2.4.4-1ubuntu1","2.4.4-2ubuntu1","2.4.4-2ubuntu1.1","2.4.4-2ubuntu1.2","2.4.4-2ubuntu1.3"],"bundled":2},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.7-1ubuntu2.20.04.2"}]}],"versions":["2.4.7-1ubuntu2"],"bundled":2},{"source":"osv","ecosystem":"openSUSE:Leap 15.2","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.3-lp152.6.3.1"}]}],"bundled":3},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.3-1.2"}]}],"bundled":10}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"fedoraproject","product":"fedora"},{"vendor":"openvpn","product":"openvpn"}],"references":[{"url":"https://github.com/OpenVPN/openvpn/commit/37bc691e7d26ea4eb61a8a434ebd7a9ae76225ab","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-11810","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=1169925","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://community.openvpn.net/openvpn/ticket/1272","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Vendor Advisory","evidence"]},{"url":"https://patchwork.openvpn.net/patch/1079/","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FGHHV4YZANZW45KZTJJGVGPFMSXYRCKZ/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JII7RYYYRBPQNEGGVSOXCM7JUZ43T3VH/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-11810","tags":["advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FGHHV4YZANZW45KZTJJGVGPFMSXYRCKZ/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JII7RYYYRBPQNEGGVSOXCM7JUZ43T3VH/"},{"url":"https://github.com/advisories/GHSA-6crj-vqv7-qq9r"},{"url":"https://security.alpinelinux.org/vuln/CVE-2020-11810","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2020-0195.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=26558","tags":["report"]},{"url":"https://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/F6UXS4WUVAGMXRRBWQNUHMT5JZYYW4KW/","tags":["web"]},{"url":"https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1064","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20211577-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1085803","tags":["report"]},{"url":"https://bugzilla.suse.com/1169925","tags":["report"]},{"url":"https://bugzilla.suse.com/1185279","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-7544","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-11810","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-15078","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2020-11810","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4933-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-11810","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-15078","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/C5VK3H4AGK4ZRCLIB2D3IB7SS5RI4AZK/","tags":["advisory"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2005-3393","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2005-3409","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2006-1629","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2006-4339","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-12166","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-7521","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-7522","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-9336","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2020-11810","description":"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.","status":"published","published":"2020-04-27T14:47:01Z","modified":"2024-08-04T11:42:00.876Z","updated_at":"2026-11-02T14:35:57.352161Z"}],"euvd":[{"id":"EUVD-2020-4152","description":"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.","status":"published","published":"2020-04-27T14:47:01Z","modified":"2024-08-04T11:42:00Z","updated_at":"2026-11-03T03:07:42.412087Z"}],"ghsa":[{"id":"GHSA-6crj-vqv7-qq9r","title":"An issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can inject a data channel v2 ...","description":"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.","status":"published","published":"2022-05-24T17:16:34Z","modified":"2023-01-29T05:02:30Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:45:06.209197Z"}],"nvd":[{"id":"CVE-2020-11810","description":"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.","status":"published","published":"2020-04-27T15:15:12.407Z","modified":"2026-06-17T02:50:50.417Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:05:59.718774Z"}],"osv":[{"id":"ALPINE-CVE-2020-11810","description":"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.","status":"published","published":"2020-04-27T15:15:12.407Z","modified":"2026-10-26T11:17:55.101219665Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:27:48.11886Z"},{"id":"CVE-2020-11810","description":"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.","status":"published","published":"2020-04-27T15:15:12.407Z","modified":"2026-10-24T14:22:35.868811285Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:44:14.034736Z"},{"id":"DEBIAN-CVE-2020-11810","description":"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.","status":"published","published":"2020-04-27T15:15:12.407Z","modified":"2026-10-26T12:01:24.467990715Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:45:32.862554Z"},{"id":"OESA-2021-1064","title":"openvpn security update","description":"OpenVPN is a full-featured open source SSL VPN solution that accommodates a wide range of configurations, including remote access, site-to-site VPNs, Wi-Fi security, and enterprise-scale remote access solutions with load balancing, failover, and fine-grained access-controls. Starting with the fundamental premise that complexity is the enemy of security, OpenVPN offers a cost-effective, lightweight alternative to other VPN technologies that is well-adapted for the SME and enterprise markets.\r\n\r\nSecurity Fix(es):\r\n\r\nAn 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.(CVE-2020-11810)","status":"published","published":"2021-03-05T11:04:17Z","modified":"2026-08-18T01:15:15.59429855Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:52:38.987987Z"},{"id":"UBUNTU-CVE-2020-11810","description":"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.","status":"published","published":"2020-04-27T15:15:00Z","modified":"2026-02-04T03:07:36.910087Z","cvss":[{"version":"3.1","score":3.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:54:22.212782Z"},{"id":"DLA-2992-1","title":"openvpn - security update","status":"published","published":"2022-05-03T00:00:00Z","modified":"2026-03-09T01:20:24.861872Z","updated_at":"2026-11-02T15:46:11.189256Z"},{"id":"MGASA-2020-0195","title":"Updated openvpn packages fix security vulnerability","description":"Updated openvpn packages fix security vulnerability:\n\nAn issue was discovered in OpenVPN 2.4.x before 2.4.9. An attacker can\ninject a data channel v2 (P_DATA_V2) packet using a victim's peer-id.\nNormally such packets are dropped, but if this packet arrives before the\ndata channel crypto parameters have been initialized, the victim's\nconnection will be dropped. This requires careful timing due to the small\ntime window (usually within a few seconds) between the victim client\nconnection starting and the server PUSH_REPLY response back to the client.\nThis attack will only work if Negotiable Cipher Parameters (NCP) is in\nuse (CVE-2020-11810).\n\nThe openvpn package has been updated to version 2.4.9, fixing the issue\nand other bugs. See the upstream release notes for details.\n","status":"published","published":"2020-05-05T12:20:37Z","modified":"2026-04-16T04:44:00.465196226Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"openSUSE-SU-2021:0734-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2020-15078: Fixed authentication bypass with deferred authentication (bsc#1185279).\n- CVE-2020-11810: Fixed race condition between allocating peer-id and initializing data channel key (bsc#1169925).\n- CVE-2018-7544: Fixed cross-protocol scripting issue that was discovered in the management interface (bsc#1085803).\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2021-05-15T16:04:52Z","modified":"2026-02-04T02:56:05.067112Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2024:11128-1","title":"openvpn-2.5.3-1.2 on GA media","description":"These are all security issues fixed in the openvpn-2.5.3-1.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:53:06.953443Z","updated_at":"2026-11-02T16:58:34.894275Z"},{"id":"SUSE-SU-2021:1577-1","title":"Security update for openvpn","description":"This update for openvpn fixes the following issues:\n\n- CVE-2020-15078: Fixed authentication bypass with deferred authentication (bsc#1185279).\n- CVE-2020-11810: Fixed race condition between allocating peer-id and initializing data channel key (bsc#1169925).\n- CVE-2018-7544: Fixed cross-protocol scripting issue that was discovered in the management interface (bsc#1085803).\n","status":"published","published":"2021-05-12T10:07:01Z","modified":"2026-02-04T02:40:50.107091Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"USN-4933-1","title":"openvpn vulnerabilities","description":"It was discovered that OpenVPN incorrectly handled certain data channel v2\npackets. A remote attacker could possibly use this issue to inject packets\nusing a victim's peer-id. This issue only affected Ubuntu 18.04 LTS and\nUbuntu 20.04 LTS. (CVE-2020-11810)\n\nIt was discovered that OpenVPN incorrectly handled deferred authentication.\nWhen a server is configured to use deferred authentication, a remote\nattacker could possibly use this issue to bypass authentication and access\ncontrol channel data. (CVE-2020-15078)\n","status":"published","published":"2021-05-04T11:59:09Z","modified":"2026-02-10T04:42:09Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}