UBUNTU-CVE-2021-40874

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Source
https://ubuntu.com/security/CVE-2021-40874
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40874.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-40874
Upstream
Published
2022-07-18T00:15:00Z
Modified
2025-09-08T16:47:22Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An issue was discovered in LemonLDAP::NG (aka lemonldap-ng) 2.0.13. When using the RESTServer plug-in to operate a REST password validation service (for another LemonLDAP::NG instance, for example) and using the Kerberos authentication method combined with another method with the Combination authentication plug-in, any password will be recognized as valid for an existing user.

References

Affected packages

Ubuntu:22.04:LTS

lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng@2.0.13+ds-3ubuntu1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.11+ds-4
2.0.13+ds-3
2.0.13+ds-3ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.0.13+ds-3ubuntu1",
            "binary_name": "lemonldap-ng"
        },
        {
            "binary_version": "2.0.13+ds-3ubuntu1",
            "binary_name": "lemonldap-ng-fastcgi-server"
        },
        {
            "binary_version": "2.0.13+ds-3ubuntu1",
            "binary_name": "lemonldap-ng-handler"
        },
        {
            "binary_version": "2.0.13+ds-3ubuntu1",
            "binary_name": "lemonldap-ng-uwsgi-app"
        },
        {
            "binary_version": "2.0.13+ds-3ubuntu1",
            "binary_name": "liblemonldap-ng-common-perl"
        },
        {
            "binary_version": "2.0.13+ds-3ubuntu1",
            "binary_name": "liblemonldap-ng-handler-perl"
        },
        {
            "binary_version": "2.0.13+ds-3ubuntu1",
            "binary_name": "liblemonldap-ng-manager-perl"
        },
        {
            "binary_version": "2.0.13+ds-3ubuntu1",
            "binary_name": "liblemonldap-ng-portal-perl"
        }
    ]
}

Ubuntu:24.04:LTS

lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng@2.18.2+ds-1?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.16.2+ds-1
2.17.1+ds-1
2.17.2+ds-1
2.17.2+ds-2
2.18.1+ds-1
2.18.2+ds-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.18.2+ds-1",
            "binary_name": "lemonldap-ng"
        },
        {
            "binary_version": "2.18.2+ds-1",
            "binary_name": "lemonldap-ng-fastcgi-server"
        },
        {
            "binary_version": "2.18.2+ds-1",
            "binary_name": "lemonldap-ng-handler"
        },
        {
            "binary_version": "2.18.2+ds-1",
            "binary_name": "lemonldap-ng-uwsgi-app"
        },
        {
            "binary_version": "2.18.2+ds-1",
            "binary_name": "liblemonldap-ng-common-perl"
        },
        {
            "binary_version": "2.18.2+ds-1",
            "binary_name": "liblemonldap-ng-handler-perl"
        },
        {
            "binary_version": "2.18.2+ds-1",
            "binary_name": "liblemonldap-ng-manager-perl"
        },
        {
            "binary_version": "2.18.2+ds-1",
            "binary_name": "liblemonldap-ng-portal-perl"
        },
        {
            "binary_version": "2.18.2+ds-1",
            "binary_name": "liblemonldap-ng-ssoaas-apache-client-perl"
        }
    ]
}

Ubuntu:25.04

lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng@2.20.2+ds-1build1?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.19.1+ds-4
2.20.0+ds-2
2.20.1+ds-1
2.20.2+ds-1
2.20.2+ds-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.20.2+ds-1build1",
            "binary_name": "lemonldap-ng"
        },
        {
            "binary_version": "2.20.2+ds-1build1",
            "binary_name": "lemonldap-ng-fastcgi-server"
        },
        {
            "binary_version": "2.20.2+ds-1build1",
            "binary_name": "lemonldap-ng-handler"
        },
        {
            "binary_version": "2.20.2+ds-1build1",
            "binary_name": "lemonldap-ng-uwsgi-app"
        },
        {
            "binary_version": "2.20.2+ds-1build1",
            "binary_name": "liblemonldap-ng-common-perl"
        },
        {
            "binary_version": "2.20.2+ds-1build1",
            "binary_name": "liblemonldap-ng-handler-perl"
        },
        {
            "binary_version": "2.20.2+ds-1build1",
            "binary_name": "liblemonldap-ng-manager-perl"
        },
        {
            "binary_version": "2.20.2+ds-1build1",
            "binary_name": "liblemonldap-ng-portal-perl"
        },
        {
            "binary_version": "2.20.2+ds-1build1",
            "binary_name": "liblemonldap-ng-ssoaas-apache-client-perl"
        }
    ]
}

Ubuntu:Pro:16.04:LTS

lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng@1.4.6-3?arch=source&distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.3.3-1
1.4.6-1
1.4.6-2
1.4.6-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.4.6-3",
            "binary_name": "lemonldap-ng"
        },
        {
            "binary_version": "1.4.6-3",
            "binary_name": "liblemonldap-ng-common-perl"
        },
        {
            "binary_version": "1.4.6-3",
            "binary_name": "liblemonldap-ng-conf-perl"
        },
        {
            "binary_version": "1.4.6-3",
            "binary_name": "liblemonldap-ng-handler-perl"
        },
        {
            "binary_version": "1.4.6-3",
            "binary_name": "liblemonldap-ng-manager-perl"
        },
        {
            "binary_version": "1.4.6-3",
            "binary_name": "liblemonldap-ng-portal-perl"
        }
    ]
}

Ubuntu:Pro:18.04:LTS

lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng@1.9.16-2?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.9.10-1
1.9.13-2
1.9.14-1
1.9.15-1
1.9.16-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.9.16-2",
            "binary_name": "lemonldap-ng"
        },
        {
            "binary_version": "1.9.16-2",
            "binary_name": "lemonldap-ng-fastcgi-server"
        },
        {
            "binary_version": "1.9.16-2",
            "binary_name": "lemonldap-ng-handler"
        },
        {
            "binary_version": "1.9.16-2",
            "binary_name": "liblemonldap-ng-common-perl"
        },
        {
            "binary_version": "1.9.16-2",
            "binary_name": "liblemonldap-ng-handler-perl"
        },
        {
            "binary_version": "1.9.16-2",
            "binary_name": "liblemonldap-ng-manager-perl"
        },
        {
            "binary_version": "1.9.16-2",
            "binary_name": "liblemonldap-ng-portal-perl"
        }
    ]
}

Ubuntu:Pro:20.04:LTS

lemonldap-ng

Package

Name
lemonldap-ng
Purl
pkg:deb/ubuntu/lemonldap-ng@2.0.7+ds-2?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.5+ds-2
2.0.6+ds-2
2.0.7+ds-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.0.7+ds-2",
            "binary_name": "lemonldap-ng"
        },
        {
            "binary_version": "2.0.7+ds-2",
            "binary_name": "lemonldap-ng-fastcgi-server"
        },
        {
            "binary_version": "2.0.7+ds-2",
            "binary_name": "lemonldap-ng-handler"
        },
        {
            "binary_version": "2.0.7+ds-2",
            "binary_name": "lemonldap-ng-uwsgi-app"
        },
        {
            "binary_version": "2.0.7+ds-2",
            "binary_name": "liblemonldap-ng-common-perl"
        },
        {
            "binary_version": "2.0.7+ds-2",
            "binary_name": "liblemonldap-ng-handler-perl"
        },
        {
            "binary_version": "2.0.7+ds-2",
            "binary_name": "liblemonldap-ng-manager-perl"
        },
        {
            "binary_version": "2.0.7+ds-2",
            "binary_name": "liblemonldap-ng-portal-perl"
        }
    ]
}