ubuntu-cve-2021-3621
Vulnerability from osv_ubuntu
Published
2021-08-16 00:00
Modified
2026-04-22 07:39
Summary
Details
A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs-fetch and cache-expire subcommands. This flaw allows an attacker to trick the root user into running a specially crafted sssctl command, such as via sudo, to gain root access. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Severity
8.8 (High)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libipa-hbac0",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "libnss-sss",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "libpam-sss",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "libsss-certmap0",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "libsss-idmap0",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "libsss-nss-idmap0",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "libsss-simpleifp0",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "libsss-sudo",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "libwbclient-sssd",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "python-libipa-hbac",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "python-libsss-nss-idmap",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "python-sss",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "python3-libipa-hbac",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "python3-libsss-nss-idmap",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "python3-sss",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-ad",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-ad-common",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-common",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-dbus",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-ipa",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-kcm",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-krb5",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-krb5-common",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-ldap",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-proxy",
"binary_version": "1.16.1-1ubuntu1.8"
},
{
"binary_name": "sssd-tools",
"binary_version": "1.16.1-1ubuntu1.8"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "sssd",
"purl": "pkg:deb/ubuntu/sssd@1.16.1-1ubuntu1.8?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.16.1-1ubuntu1.8"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.15.3-2ubuntu1",
"1.15.3-3ubuntu1",
"1.16.0-5ubuntu1",
"1.16.0-5ubuntu2",
"1.16.1-1ubuntu1",
"1.16.1-1ubuntu1.1",
"1.16.1-1ubuntu1.2",
"1.16.1-1ubuntu1.3",
"1.16.1-1ubuntu1.4",
"1.16.1-1ubuntu1.5",
"1.16.1-1ubuntu1.6",
"1.16.1-1ubuntu1.7"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libipa-hbac0",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "libnss-sss",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "libpam-sss",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "libsss-certmap0",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "libsss-idmap0",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "libsss-nss-idmap0",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "libsss-simpleifp0",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "libsss-sudo",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "libwbclient-sssd",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "python3-libipa-hbac",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "python3-libsss-nss-idmap",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "python3-sss",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-ad",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-ad-common",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-common",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-dbus",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-ipa",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-kcm",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-krb5",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-krb5-common",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-ldap",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-proxy",
"binary_version": "2.2.3-3ubuntu0.7"
},
{
"binary_name": "sssd-tools",
"binary_version": "2.2.3-3ubuntu0.7"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "sssd",
"purl": "pkg:deb/ubuntu/sssd@2.2.3-3ubuntu0.7?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.2.3-3ubuntu0.7"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.0-4ubuntu1",
"2.2.2-1",
"2.2.2-1ubuntu1",
"2.2.3-1.1ubuntu1",
"2.2.3-2",
"2.2.3-3",
"2.2.3-3ubuntu0.1",
"2.2.3-3ubuntu0.2",
"2.2.3-3ubuntu0.3",
"2.2.3-3ubuntu0.4",
"2.2.3-3ubuntu0.6"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libipa-hbac0",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "libnss-sss",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "libpam-sss",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "libsss-certmap0",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "libsss-idmap0",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "libsss-nss-idmap0",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "libsss-simpleifp0",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "libsss-sudo",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "libwbclient-sssd",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "python3-libipa-hbac",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "python3-libsss-nss-idmap",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "python3-sss",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-ad",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-ad-common",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-common",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-dbus",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-ipa",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-kcm",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-krb5",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-krb5-common",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-ldap",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-proxy",
"binary_version": "2.4.1-2ubuntu4"
},
{
"binary_name": "sssd-tools",
"binary_version": "2.4.1-2ubuntu4"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "sssd",
"purl": "pkg:deb/ubuntu/sssd@2.4.1-2ubuntu4?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.1-2ubuntu4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": []
}
],
"aliases": [],
"details": "A flaw was found in SSSD, where the sssctl command was vulnerable to shell command injection via the logs-fetch and cache-expire subcommands. This flaw allows an attacker to trick the root user into running a specially crafted sssctl command, such as via sudo, to gain root access. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.",
"id": "UBUNTU-CVE-2021-3621",
"modified": "2026-04-22T07:39:47Z",
"published": "2021-08-16T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-3621"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5067-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-3621"
}
],
"related": [
"USN-5067-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-3621"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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