{"id":"USN-6138-1","summary":"libssh vulnerabilities","details":"Philip Turnbull discovered that libssh incorrectly handled rekeying with\nalgorithm guessing. A remote attacker could use this issue to cause libssh\nto crash, resulting in a denial of service, or possibly execute arbitrary\ncode. (CVE-2023-1667)\n\nKevin Backhouse discovered that libssh incorrectly handled verifying data\nsignatures. A remote attacker could possibly use this issue to bypass\nauthorization. (CVE-2023-2283)\n","modified":"2026-04-22T11:00:28.445364Z","published":"2023-06-05T14:08:01Z","related":["UBUNTU-CVE-2023-1667","UBUNTU-CVE-2023-2283"],"upstream":["CVE-2023-1667","CVE-2023-2283","UBUNTU-CVE-2023-1667","UBUNTU-CVE-2023-2283"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6138-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-1667"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-2283"}],"affected":[{"package":{"name":"libssh","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libssh@0.9.3-2ubuntu2.3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.3-2ubuntu2.3"}]}],"versions":["0.9.0-1ubuntu1","0.9.0-1ubuntu4","0.9.0-1ubuntu5","0.9.3-2ubuntu1","0.9.3-2ubuntu2","0.9.3-2ubuntu2.1","0.9.3-2ubuntu2.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libssh-4","binary_version":"0.9.3-2ubuntu2.3"},{"binary_name":"libssh-gcrypt-4","binary_version":"0.9.3-2ubuntu2.3"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-1667","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-2283","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6138-1.json"}},{"package":{"name":"libssh","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libssh@0.9.6-2ubuntu0.22.04.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.6-2ubuntu0.22.04.1"}]}],"versions":["0.9.6-1","0.9.6-1build1","0.9.6-2","0.9.6-2build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libssh-4","binary_version":"0.9.6-2ubuntu0.22.04.1"},{"binary_name":"libssh-gcrypt-4","binary_version":"0.9.6-2ubuntu0.22.04.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-1667","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2023-2283","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6138-1.json"}}],"schema_version":"1.7.5"}