{"id":"USN-7270-1","summary":"openssh vulnerabilities","details":"It was discovered that the OpenSSH client incorrectly handled the\nnon-default VerifyHostKeyDNS option. If that option were enabled, an\nattacker could possibly impersonate a server by completely bypassing the\nserver identity check. (CVE-2025-26465)\n\nIt was discovered that OpenSSH incorrectly handled the transport-level ping\nfacility. A remote attacker could possibly use this issue to cause OpenSSH\nclients and servers to consume resources, leading to a denial of service.\nThis issue only affected Ubuntu 24.04 LTS and Ubuntu 24.10.\n(CVE-2025-26466)\n","modified":"2026-04-27T17:47:14.787794314Z","published":"2025-02-18T13:04:34Z","related":["UBUNTU-CVE-2025-26465","UBUNTU-CVE-2025-26466"],"upstream":["CVE-2025-26465","CVE-2025-26466","UBUNTU-CVE-2025-26465","UBUNTU-CVE-2025-26466"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7270-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-26465"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-26466"}],"affected":[{"package":{"name":"openssh","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:8.2p1-4ubuntu0.12?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:8.2p1-4ubuntu0.12"}]}],"versions":["1:8.0p1-6build1","1:8.1p1-1","1:8.1p1-5","1:8.2p1-4","1:8.2p1-4ubuntu0.1","1:8.2p1-4ubuntu0.2","1:8.2p1-4ubuntu0.3","1:8.2p1-4ubuntu0.4","1:8.2p1-4ubuntu0.5","1:8.2p1-4ubuntu0.7","1:8.2p1-4ubuntu0.8","1:8.2p1-4ubuntu0.9","1:8.2p1-4ubuntu0.10","1:8.2p1-4ubuntu0.11"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"openssh-client","binary_version":"1:8.2p1-4ubuntu0.12"},{"binary_name":"openssh-server","binary_version":"1:8.2p1-4ubuntu0.12"},{"binary_version":"1:8.2p1-4ubuntu0.12","binary_name":"openssh-sftp-server"},{"binary_name":"openssh-tests","binary_version":"1:8.2p1-4ubuntu0.12"},{"binary_name":"ssh","binary_version":"1:8.2p1-4ubuntu0.12"},{"binary_name":"ssh-askpass-gnome","binary_version":"1:8.2p1-4ubuntu0.12"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"id":"CVE-2025-26465","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7270-1.json"}},{"package":{"name":"openssh","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:8.9p1-3ubuntu0.11?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:8.9p1-3ubuntu0.11"}]}],"versions":["1:8.4p1-6ubuntu2","1:8.7p1-2","1:8.7p1-2build1","1:8.7p1-4","1:8.8p1-1","1:8.9p1-3","1:8.9p1-3ubuntu0.1","1:8.9p1-3ubuntu0.3","1:8.9p1-3ubuntu0.4","1:8.9p1-3ubuntu0.5","1:8.9p1-3ubuntu0.6","1:8.9p1-3ubuntu0.7","1:8.9p1-3ubuntu0.10"],"ecosystem_specific":{"binaries":[{"binary_name":"openssh-client","binary_version":"1:8.9p1-3ubuntu0.11"},{"binary_name":"openssh-server","binary_version":"1:8.9p1-3ubuntu0.11"},{"binary_name":"openssh-sftp-server","binary_version":"1:8.9p1-3ubuntu0.11"},{"binary_name":"openssh-tests","binary_version":"1:8.9p1-3ubuntu0.11"},{"binary_name":"ssh","binary_version":"1:8.9p1-3ubuntu0.11"},{"binary_name":"ssh-askpass-gnome","binary_version":"1:8.9p1-3ubuntu0.11"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2025-26465","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/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-7270-1.json"}},{"package":{"name":"openssh","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/openssh@1:9.6p1-3ubuntu13.8?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.6p1-3ubuntu13.8"}]}],"versions":["1:9.3p1-1ubuntu3","1:9.4p1-1ubuntu1","1:9.6p1-3ubuntu1","1:9.6p1-3ubuntu2","1:9.6p1-3ubuntu11","1:9.6p1-3ubuntu12","1:9.6p1-3ubuntu13","1:9.6p1-3ubuntu13.3","1:9.6p1-3ubuntu13.4","1:9.6p1-3ubuntu13.5","1:9.6p1-3ubuntu13.7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"openssh-client","binary_version":"1:9.6p1-3ubuntu13.8"},{"binary_version":"1:9.6p1-3ubuntu13.8","binary_name":"openssh-server"},{"binary_name":"openssh-sftp-server","binary_version":"1:9.6p1-3ubuntu13.8"},{"binary_name":"openssh-tests","binary_version":"1:9.6p1-3ubuntu13.8"},{"binary_name":"ssh","binary_version":"1:9.6p1-3ubuntu13.8"},{"binary_version":"1:9.6p1-3ubuntu13.8","binary_name":"ssh-askpass-gnome"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2025-26465","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2025-26466"}],"ecosystem":"Ubuntu:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7270-1.json"}}],"schema_version":"1.7.5"}