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vuln-ubuntu/data/osv/usn/USN-6279-1.json
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{
"schema_version": "1.7.0",
"id": "USN-6279-1",
"summary": "openssh update",
"details": "It was discovered that OpenSSH has an observable discrepancy leading to an\ninformation leak in the algorithm negotiation. This update mitigates the\nissue by tweaking the client hostkey preference ordering algorithm to\nprefer the default ordering if the user has a key that matches the\nbest-preference default algorithm.\n",
"aliases": [],
"upstream": [],
"related": [],
"published": "2023-08-09T06:08:18Z",
"modified": "2026-06-29T10:53:03Z",
"affected": [
{
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "openssh",
"purl": "pkg:deb/ubuntu/openssh@1:6.6p1-2ubuntu2.13+esm2?arch=source&distro=trusty/esm"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:6.6p1-2ubuntu2.13+esm2"
}
]
}
],
"versions": [
"1:6.2p2-6",
"1:6.2p2-6ubuntu1",
"1:6.4p1-1",
"1:6.4p1-2",
"1:6.5p1-1",
"1:6.5p1-2",
"1:6.5p1-3",
"1:6.5p1-4",
"1:6.5p1-6",
"1:6.6p1-1",
"1:6.6p1-2",
"1:6.6p1-2ubuntu1",
"1:6.6p1-2ubuntu2",
"1:6.6p1-2ubuntu2.2",
"1:6.6p1-2ubuntu2.3",
"1:6.6p1-2ubuntu2.4",
"1:6.6p1-2ubuntu2.6",
"1:6.6p1-2ubuntu2.7",
"1:6.6p1-2ubuntu2.8",
"1:6.6p1-2ubuntu2.10",
"1:6.6p1-2ubuntu2.11",
"1:6.6p1-2ubuntu2.12",
"1:6.6p1-2ubuntu2.13",
"1:6.6p1-2ubuntu2.13+esm1"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "openssh-client",
"binary_version": "1:6.6p1-2ubuntu2.13+esm2"
},
{
"binary_name": "openssh-server",
"binary_version": "1:6.6p1-2ubuntu2.13+esm2"
},
{
"binary_name": "openssh-sftp-server",
"binary_version": "1:6.6p1-2ubuntu2.13+esm2"
},
{
"binary_name": "ssh",
"binary_version": "1:6.6p1-2ubuntu2.13+esm2"
},
{
"binary_name": "ssh-askpass-gnome",
"binary_version": "1:6.6p1-2ubuntu2.13+esm2"
},
{
"binary_name": "ssh-krb5",
"binary_version": "1:6.6p1-2ubuntu2.13+esm2"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
},
"database_specific": {
"cves_map": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"cves": []
}
}
},
{
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "openssh",
"purl": "pkg:deb/ubuntu/openssh@1:7.2p2-4ubuntu2.10+esm4?arch=source&distro=esm-infra/xenial"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:7.2p2-4ubuntu2.10+esm4"
}
]
}
],
"versions": [
"1:6.9p1-2",
"1:6.9p1-3",
"1:7.1p1-1",
"1:7.1p1-3",
"1:7.1p1-4",
"1:7.1p1-6",
"1:7.1p2-1",
"1:7.1p2-2",
"1:7.2p1-1",
"1:7.2p2-1",
"1:7.2p2-2",
"1:7.2p2-3",
"1:7.2p2-4",
"1:7.2p2-4ubuntu1",
"1:7.2p2-4ubuntu2.1",
"1:7.2p2-4ubuntu2.2",
"1:7.2p2-4ubuntu2.4",
"1:7.2p2-4ubuntu2.5",
"1:7.2p2-4ubuntu2.6",
"1:7.2p2-4ubuntu2.7",
"1:7.2p2-4ubuntu2.8",
"1:7.2p2-4ubuntu2.10",
"1:7.2p2-4ubuntu2.10+esm1",
"1:7.2p2-4ubuntu2.10+esm2",
"1:7.2p2-4ubuntu2.10+esm3"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "openssh-client",
"binary_version": "1:7.2p2-4ubuntu2.10+esm4"
},
{
"binary_name": "openssh-client-ssh1",
"binary_version": "1:7.2p2-4ubuntu2.10+esm4"
},
{
"binary_name": "openssh-server",
"binary_version": "1:7.2p2-4ubuntu2.10+esm4"
},
{
"binary_name": "openssh-sftp-server",
"binary_version": "1:7.2p2-4ubuntu2.10+esm4"
},
{
"binary_name": "ssh",
"binary_version": "1:7.2p2-4ubuntu2.10+esm4"
},
{
"binary_name": "ssh-askpass-gnome",
"binary_version": "1:7.2p2-4ubuntu2.10+esm4"
},
{
"binary_name": "ssh-krb5",
"binary_version": "1:7.2p2-4ubuntu2.10+esm4"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
},
"database_specific": {
"cves_map": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"cves": []
}
}
},
{
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "openssh",
"purl": "pkg:deb/ubuntu/openssh@1:7.6p1-4ubuntu0.7+esm2?arch=source&distro=esm-infra/bionic"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:7.6p1-4ubuntu0.7+esm2"
}
]
}
],
"versions": [
"1:7.5p1-10",
"1:7.6p1-4",
"1:7.6p1-4ubuntu0.1",
"1:7.6p1-4ubuntu0.2",
"1:7.6p1-4ubuntu0.3",
"1:7.6p1-4ubuntu0.5",
"1:7.6p1-4ubuntu0.6",
"1:7.6p1-4ubuntu0.7",
"1:7.6p1-4ubuntu0.7+esm1"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "openssh-client",
"binary_version": "1:7.6p1-4ubuntu0.7+esm2"
},
{
"binary_name": "openssh-server",
"binary_version": "1:7.6p1-4ubuntu0.7+esm2"
},
{
"binary_name": "openssh-sftp-server",
"binary_version": "1:7.6p1-4ubuntu0.7+esm2"
},
{
"binary_name": "ssh",
"binary_version": "1:7.6p1-4ubuntu0.7+esm2"
},
{
"binary_name": "ssh-askpass-gnome",
"binary_version": "1:7.6p1-4ubuntu0.7+esm2"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
},
"database_specific": {
"cves_map": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"cves": []
}
}
},
{
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "openssh",
"purl": "pkg:deb/ubuntu/openssh@1:8.2p1-4ubuntu0.9?arch=source&distro=focal"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1:8.2p1-4ubuntu0.9"
}
]
}
],
"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"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "openssh-client",
"binary_version": "1:8.2p1-4ubuntu0.9"
},
{
"binary_name": "openssh-server",
"binary_version": "1:8.2p1-4ubuntu0.9"
},
{
"binary_name": "openssh-sftp-server",
"binary_version": "1:8.2p1-4ubuntu0.9"
},
{
"binary_name": "openssh-tests",
"binary_version": "1:8.2p1-4ubuntu0.9"
},
{
"binary_name": "ssh",
"binary_version": "1:8.2p1-4ubuntu0.9"
},
{
"binary_name": "ssh-askpass-gnome",
"binary_version": "1:8.2p1-4ubuntu0.9"
}
],
"availability": "No subscription required"
},
"database_specific": {
"cves_map": {
"ecosystem": "Ubuntu:20.04:LTS",
"cves": []
}
}
}
],
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6279-1"
},
{
"type": "REPORT",
"url": "https://launchpad.net/bugs/2030275"
}
]
}