{"id":"UBUNTU-CVE-2021-4186","details":"Crash in the Gryphon dissector in Wireshark 3.4.0 to 3.4.10 allows denial of service via packet injection or crafted capture file","modified":"2026-04-22T14:59:11.258766Z","published":"2021-12-30T22:15:00Z","related":["USN-7552-1"],"upstream":["CVE-2021-4186"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-4186"},{"type":"REPORT","url":"https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4186.json"},{"type":"REPORT","url":"https://gitlab.com/wireshark/wireshark/-/issues/17737"},{"type":"REPORT","url":"https://www.wireshark.org/security/wnpa-sec-2021-16.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-4186"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7552-1"}],"affected":[{"package":{"name":"wireshark","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/wireshark@3.2.3-1ubuntu0.1~esm2?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.3-1ubuntu0.1~esm2"}]}],"versions":["3.0.5-1","3.0.7-1","3.2.1-1","3.2.2-1","3.2.3-1","3.2.3-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libwireshark-data","binary_version":"3.2.3-1ubuntu0.1~esm2"},{"binary_name":"libwireshark13","binary_version":"3.2.3-1ubuntu0.1~esm2"},{"binary_name":"libwiretap10","binary_version":"3.2.3-1ubuntu0.1~esm2"},{"binary_name":"libwsutil11","binary_version":"3.2.3-1ubuntu0.1~esm2"},{"binary_name":"tshark","binary_version":"3.2.3-1ubuntu0.1~esm2"},{"binary_name":"wireshark","binary_version":"3.2.3-1ubuntu0.1~esm2"},{"binary_name":"wireshark-common","binary_version":"3.2.3-1ubuntu0.1~esm2"},{"binary_name":"wireshark-gtk","binary_version":"3.2.3-1ubuntu0.1~esm2"},{"binary_name":"wireshark-qt","binary_version":"3.2.3-1ubuntu0.1~esm2"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-4186.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}