{"schema_version":"1.7.5","id":"CVE-2020-1730","published":"2020-04-13T19:15:11.173Z","modified":"2026-07-08T05:55:47.414123364Z","related":["SUSE-SU-2020:0967-1","SUSE-SU-2020:0968-1","SUSE-SU-2024:0525-1","SUSE-SU-2024:0539-1","openSUSE-SU-2020:0510-1","openSUSE-SU-2024:11603-1"],"details":"A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.","affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.com/libssh/libssh-mirror","events":[{"introduced":"d66ea0b3b100664916cbab965e79a870e31ac7fe"},{"fixed":"04685a74df9ce1db1bc116a83a0da78b4f4fa1f8"},{"introduced":"79900e5246da9a1712d8822a53aaf5fd0abc6f40"},{"fixed":"9e9df6124454e2b2b5388644c90562c6a85c597d"}],"database_specific":{"cpe":"cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0.8.0"},{"fixed":"0.8.9"},{"introduced":"0.9.0"},{"fixed":"0.9.4"}],"source":"CPE_RANGE"}}],"versions":["libssh-0.8.8","libssh-0.9.3","libssh-0.9.2","libssh-0.9.1","libssh-0.9.0","libssh-0.8.7","libssh-0.8.6","libssh-0.8.5","libssh-0.8.4","libssh-0.8.3","libssh-0.8.2","libssh-0.8.1","libssh-0.8.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1730.json"}}],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2A7BIFKUYIYKTY7FX4BEWVC2OHS5DPOU/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VLSWHBQ3EPKGTGLQNH554Z746BJ3C554/"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20200424-0001/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4327-1/"},{"type":"ADVISORY","url":"https://www.libssh.org/security/advisories/CVE-2020-1730.txt"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1730"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuoct2020.html"}],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"8.0.21"}],"source":"CPE_RANGE","vendor_product":"oracle:mysql_workbench"},{"cpes":["cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*","cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"18.04"},{"last_affected":"18.04"},{"introduced":"19.10"},{"last_affected":"19.10"}],"source":"CPE_STRING","vendor_product":"canonical:ubuntu_linux"},{"cpes":["cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"31"},{"last_affected":"31"},{"introduced":"32"},{"last_affected":"32"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"},{"cpes":["cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"8.0"},{"last_affected":"8.0"}],"source":"CPE_STRING","vendor_product":"redhat:enterprise_linux"}]},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}