USN-6565-1 (UBUNTU-CVE-2021-41617)
Vulnerability from osv_ubuntu – Published: 2024-01-03 18:00 – Updated: 2026-05-29 17:44 – Source website
VLAI
Summary
openssh vulnerabilities
Details
It was discovered that OpenSSH incorrectly handled supplemental groups when running helper programs for AuthorizedKeysCommand and AuthorizedPrincipalsCommand as a different user. An attacker could possibly use this issue to escalate privileges. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-41617)
It was discovered that OpenSSH incorrectly added destination constraints when PKCS#11 token keys were added to ssh-agent, contrary to expectations. This issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-51384)
It was discovered that OpenSSH incorrectly handled user names or host names with shell metacharacters. An attacker could possibly use this issue to perform OS command injection. (CVE-2023-51385)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-41617",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2023-51385",
"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": "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:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "openssh-client",
"binary_version": "1:8.2p1-4ubuntu0.11"
},
{
"binary_name": "openssh-server",
"binary_version": "1:8.2p1-4ubuntu0.11"
},
{
"binary_name": "openssh-sftp-server",
"binary_version": "1:8.2p1-4ubuntu0.11"
},
{
"binary_name": "openssh-tests",
"binary_version": "1:8.2p1-4ubuntu0.11"
},
{
"binary_name": "ssh",
"binary_version": "1:8.2p1-4ubuntu0.11"
},
{
"binary_name": "ssh-askpass-gnome",
"binary_version": "1:8.2p1-4ubuntu0.11"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "openssh",
"purl": "pkg:deb/ubuntu/openssh@1:8.2p1-4ubuntu0.11?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:8.2p1-4ubuntu0.11"
}
],
"type": "ECOSYSTEM"
}
],
"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"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2023-51384",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2023-51385",
"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": "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"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "openssh-client",
"binary_version": "1:8.9p1-3ubuntu0.6"
},
{
"binary_name": "openssh-server",
"binary_version": "1:8.9p1-3ubuntu0.6"
},
{
"binary_name": "openssh-sftp-server",
"binary_version": "1:8.9p1-3ubuntu0.6"
},
{
"binary_name": "openssh-tests",
"binary_version": "1:8.9p1-3ubuntu0.6"
},
{
"binary_name": "ssh",
"binary_version": "1:8.9p1-3ubuntu0.6"
},
{
"binary_name": "ssh-askpass-gnome",
"binary_version": "1:8.9p1-3ubuntu0.6"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "openssh",
"purl": "pkg:deb/ubuntu/openssh@1:8.9p1-3ubuntu0.6?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1:8.9p1-3ubuntu0.6"
}
],
"type": "ECOSYSTEM"
}
],
"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"
]
}
],
"aliases": [],
"details": "It was discovered that OpenSSH incorrectly handled supplemental groups when\nrunning helper programs for AuthorizedKeysCommand and\nAuthorizedPrincipalsCommand as a different user. An attacker could possibly\nuse this issue to escalate privileges. This issue only affected Ubuntu\n20.04 LTS. (CVE-2021-41617)\n\nIt was discovered that OpenSSH incorrectly added destination constraints\nwhen PKCS#11 token keys were added to ssh-agent, contrary to expectations.\nThis issue only affected Ubuntu 22.04 LTS, and Ubuntu 23.04.\n(CVE-2023-51384)\n\nIt was discovered that OpenSSH incorrectly handled user names or host names\nwith shell metacharacters. An attacker could possibly use this issue to\nperform OS command injection. (CVE-2023-51385)\n",
"id": "USN-6565-1",
"modified": "2026-05-29T17:44:09Z",
"published": "2024-01-03T18:00:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6565-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-41617"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2023-51384"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2023-51385"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "openssh vulnerabilities",
"upstream": [
"UBUNTU-CVE-2021-41617",
"UBUNTU-CVE-2023-51384",
"UBUNTU-CVE-2023-51385"
]
}
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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.
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- 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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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