{"id":"CVE-2021-42072","details":"An issue was discovered in Barrier before 2.4.0. The barriers component (aka the server-side implementation of Barrier) does not sufficiently verify the identify of connecting clients. Clients can thus exploit weaknesses in the provided protocol to cause denial-of-service or stage further attacks that could lead to information leaks or integrity corruption.","modified":"2026-07-08T06:00:44.332939271Z","published":"2021-11-08T04:15:08.437Z","related":["openSUSE-SU-2021:1498-1","openSUSE-SU-2021:1595-1","openSUSE-SU-2024:11633-1"],"database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"34"},{"last_affected":"34"},{"introduced":"35"},{"last_affected":"35"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora","cpes":["cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*"]}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CIEVNCFEFO7L3NTM4VUZB3WKYYCBTFCI/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XMU3STOKHPEZSC54MZ42YBFFC2R3BU2Q/"},{"type":"ADVISORY","url":"https://github.com/debauchee/barrier/releases/tag/v2.4.0"},{"type":"EVIDENCE","url":"http://www.openwall.com/lists/oss-security/2021/11/02/4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/debauchee/barrier","events":[{"introduced":"0"},{"fixed":"3e0d758b59e44e6bb8b5e13cf96c824be44207ac"}],"database_specific":{"cpe":"cpe:2.3:a:barrier_project:barrier:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.4.0"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v2.3.3","v2.3.2","v2.3.1","v2.3.0","v2.1.2","v2.1.1","v2.1.0","v2.0.0","v2.0.0-RC2","v2.0.0-RC1","v1.8.1-stable","v1.8.0-beta","v1.7.3-stable","v1.7.2-stable","v1.7.1-stable","1.6.2","1.7.0","1.6.3-final","1.6.1","1.6.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-42072.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}