USN-4974-1

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Source
https://ubuntu.com/security/notices/USN-4974-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4974-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-4974-1
Upstream
Related
Published
2021-06-02T03:15:08.186658Z
Modified
2025-10-13T04:35:30Z
Summary
lasso vulnerability
Details

It was discovered that Lasso did not properly verify that all assertions in a SAML response were properly signed. An attacker could possibly use this to impersonate users or otherwise bypass access controls.

References

Affected packages

Ubuntu:18.04:LTS / lasso

Package

Name
lasso
Purl
pkg:deb/ubuntu/lasso@2.5.1-0ubuntu1.2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.5.1-0ubuntu1.2

Affected versions

2.*

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": "2.5.1-0ubuntu1.2"
        },
        {
            "binary_name": "liblasso3",
            "binary_version": "2.5.1-0ubuntu1.2"
        },
        {
            "binary_name": "liblasso3-dev",
            "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"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-28091",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "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": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:18.04:LTS"
}

Ubuntu:20.04:LTS / lasso

Package

Name
lasso
Purl
pkg:deb/ubuntu/lasso@2.6.0-7ubuntu1.2?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.6.0-7ubuntu1.2

Affected versions

2.*

2.6.0-2ubuntu1
2.6.0-2ubuntu2
2.6.0-7ubuntu1
2.6.0-7ubuntu1.1

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": "liblasso3-dev",
            "binary_version": "2.6.0-7ubuntu1.2"
        },
        {
            "binary_name": "python3-lasso",
            "binary_version": "2.6.0-7ubuntu1.2"
        }
    ]
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-28091",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "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": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:20.04:LTS"
}