ubuntu-cve-2021-28091
Vulnerability from osv_ubuntu
Published
2021-06-01 12:00
Modified
2026-04-22 07:39
Summary
Details
Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.
Severity
8.8 (High)
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "liblasso-perl",
"binary_version": "2.5.0-3ubuntu2"
},
{
"binary_name": "liblasso3",
"binary_version": "2.5.0-3ubuntu2"
},
{
"binary_name": "python-lasso",
"binary_version": "2.5.0-3ubuntu2"
},
{
"binary_name": "python3-lasso",
"binary_version": "2.5.0-3ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "lasso",
"purl": "pkg:deb/ubuntu/lasso@2.5.0-3ubuntu2?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.1-1build1",
"2.5.0-1",
"2.5.0-2",
"2.5.0-3",
"2.5.0-3build1",
"2.5.0-3ubuntu2"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "liblasso-perl",
"binary_version": "2.5.1-0ubuntu1.2"
},
{
"binary_name": "liblasso3",
"binary_version": "2.5.1-0ubuntu1.2"
},
{
"binary_name": "python-lasso",
"binary_version": "2.5.1-0ubuntu1.2"
},
{
"binary_name": "python3-lasso",
"binary_version": "2.5.1-0ubuntu1.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "lasso",
"purl": "pkg:deb/ubuntu/lasso@2.5.1-0ubuntu1.2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.5.1-0ubuntu1.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.5.0-5build4",
"2.5.0-5build5",
"2.5.0-5ubuntu1",
"2.5.1-0ubuntu1",
"2.5.1-0ubuntu1.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "liblasso-perl",
"binary_version": "2.6.0-7ubuntu1.2"
},
{
"binary_name": "liblasso3",
"binary_version": "2.6.0-7ubuntu1.2"
},
{
"binary_name": "python3-lasso",
"binary_version": "2.6.0-7ubuntu1.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "lasso",
"purl": "pkg:deb/ubuntu/lasso@2.6.0-7ubuntu1.2?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.6.0-7ubuntu1.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.6.0-2ubuntu1",
"2.6.0-2ubuntu2",
"2.6.0-7ubuntu1",
"2.6.0-7ubuntu1.1"
]
}
],
"aliases": [],
"details": "Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.",
"id": "UBUNTU-CVE-2021-28091",
"modified": "2026-04-22T07:39:57Z",
"published": "2021-06-01T12:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-28091"
},
{
"type": "REPORT",
"url": "https://git.entrouvert.org/lasso.git/commit/?id=ea7e5efe9741e1b1787a58af16cb15b40c23be5a"
},
{
"type": "REPORT",
"url": "https://blogs.akamai.com/2021/06/saml-implementation-vulnerability-impacting-some-akamai-services.html"
},
{
"type": "REPORT",
"url": "https://blogs.akamai.com/2021/06/akamai-eaa-impersonation-vulnerability---a-deep-dive.html"
},
{
"type": "REPORT",
"url": "https://blogs.akamai.com/2021/06/sogo-and-packetfence-impacted-by-saml-implementation-vulnerabilities.html"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4974-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-28091"
}
],
"related": [
"USN-4974-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-28091"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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