USN-5825-1 fixed vulnerabilities in PAM. Unfortunately that update was incomplete and could introduce a regression. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that PAM did not correctly restrict login from an IP address that is not resolvable via DNS. An attacker could possibly use this issue to bypass authentication.
{
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"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
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"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5825-2.json"
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"id": "CVE-2022-28321",
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"type": "CVSS_V3",
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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"binary_version": "1.1.8-3.2ubuntu2.3+esm4",
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"binary_version": "1.1.8-3.2ubuntu2.3+esm4",
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"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5825-2.json"
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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"type": "Ubuntu",
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}
{
"binaries": [
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"binary_version": "1.1.8-3.6ubuntu2.18.04.6",
"binary_name": "libpam-cracklib"
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"binary_version": "1.1.8-3.6ubuntu2.18.04.6",
"binary_name": "libpam-modules"
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"binary_version": "1.1.8-3.6ubuntu2.18.04.6",
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"binary_version": "1.1.8-3.6ubuntu2.18.04.6",
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"binary_version": "1.1.8-3.6ubuntu2.18.04.6",
"binary_name": "libpam0g"
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"availability": "No subscription required"
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"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5825-2.json"
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"type": "CVSS_V3",
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{
"type": "CVSS_V3",
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{
"type": "Ubuntu",
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{
"binaries": [
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"binary_version": "1.3.1-5ubuntu4.6",
"binary_name": "libpam-cracklib"
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"binary_version": "1.3.1-5ubuntu4.6",
"binary_name": "libpam-modules"
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"binary_version": "1.3.1-5ubuntu4.6",
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"binary_version": "1.3.1-5ubuntu4.6",
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"binary_version": "1.3.1-5ubuntu4.6",
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"availability": "No subscription required"
}
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5825-2.json"
{
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"type": "CVSS_V3",
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"type": "CVSS_V3",
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{
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"binary_version": "1.4.0-11ubuntu2.3",
"binary_name": "libpam-cracklib"
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"binary_version": "1.4.0-11ubuntu2.3",
"binary_name": "libpam-modules"
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"binary_version": "1.4.0-11ubuntu2.3",
"binary_name": "libpam-modules-bin"
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{
"binary_version": "1.4.0-11ubuntu2.3",
"binary_name": "libpam-runtime"
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{
"binary_version": "1.4.0-11ubuntu2.3",
"binary_name": "libpam0g"
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],
"availability": "No subscription required"
}
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5825-2.json"
{
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{
"type": "CVSS_V3",
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{
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}