UBUNTU-CVE-2020-24612

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Source
https://ubuntu.com/security/CVE-2020-24612
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-24612
Upstream
Published
2020-08-24T21:15:00Z
Modified
2026-05-20T16:04:17.166051064Z
Severity
  • 6.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

An issue was discovered in the selinux-policy (aka Reference Policy) package 3.14 through 2020-08-24 because the .config/Yubico directory is mishandled. Consequently, when SELinux is in enforced mode, pam-u2f is not allowed to read the user's U2F configuration file. If configured with the nouserok option (the default when configured by the authselect tool), and that file cannot be read, the second factor is disabled. An attacker with only the knowledge of the password can then log in, bypassing 2FA.

References

Affected packages

Ubuntu:14.04:LTS
refpolicy

Package

Name
refpolicy
Purl
pkg:deb/ubuntu/refpolicy?arch=source&distro=trusty

Affected ranges

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

Affected versions

2:2.*
2:2.20110726-12
2:2.20110726-13
2:2.20131214-1
2:2.20140206-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:2.20140206-1",
            "binary_name": "selinux-policy-default"
        },
        {
            "binary_version": "2:2.20140206-1",
            "binary_name": "selinux-policy-mls"
        },
        {
            "binary_version": "2:2.20140206-1",
            "binary_name": "selinux-policy-src"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
Ubuntu:16.04:LTS
refpolicy

Package

Name
refpolicy
Purl
pkg:deb/ubuntu/refpolicy?arch=source&distro=xenial

Affected ranges

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

Affected versions

2:2.*
2:2.20140421-9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:2.20140421-9",
            "binary_name": "selinux-policy-default"
        },
        {
            "binary_version": "2:2.20140421-9",
            "binary_name": "selinux-policy-mls"
        },
        {
            "binary_version": "2:2.20140421-9",
            "binary_name": "selinux-policy-src"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
Ubuntu:18.04:LTS
refpolicy

Package

Name
refpolicy
Purl
pkg:deb/ubuntu/refpolicy?arch=source&distro=bionic

Affected ranges

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

Affected versions

2:2.*
2:2.20161023.1-9
2:2.20161023.1-10
2:2.20171228-1
2:2.20180114-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:2.20180114-1",
            "binary_name": "selinux-policy-default"
        },
        {
            "binary_version": "2:2.20180114-1",
            "binary_name": "selinux-policy-mls"
        },
        {
            "binary_version": "2:2.20180114-1",
            "binary_name": "selinux-policy-src"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
Ubuntu:20.04:LTS
refpolicy

Package

Name
refpolicy
Purl
pkg:deb/ubuntu/refpolicy?arch=source&distro=focal

Affected ranges

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

Affected versions

2:2.*
2:2.20190201-4
2:2.20190201-5
2:2.20190201-6
2:2.20190201-7
2:2.20190201-8

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:2.20190201-8",
            "binary_name": "selinux-policy-default"
        },
        {
            "binary_version": "2:2.20190201-8",
            "binary_name": "selinux-policy-mls"
        },
        {
            "binary_version": "2:2.20190201-8",
            "binary_name": "selinux-policy-src"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
Ubuntu:22.04:LTS
refpolicy

Package

Name
refpolicy
Purl
pkg:deb/ubuntu/refpolicy?arch=source&distro=jammy

Affected ranges

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

Affected versions

2:2.*
2:2.20210203-7
2:2.20210203-9
2:2.20210203-10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:2.20210203-10",
            "binary_name": "selinux-policy-default"
        },
        {
            "binary_version": "2:2.20210203-10",
            "binary_name": "selinux-policy-mls"
        },
        {
            "binary_version": "2:2.20210203-10",
            "binary_name": "selinux-policy-src"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
Ubuntu:24.04:LTS
refpolicy

Package

Name
refpolicy
Purl
pkg:deb/ubuntu/refpolicy?arch=source&distro=noble

Affected ranges

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

Affected versions

2:2.*
2:2.20230929-1
2:2.20231010-1
2:2.20231119-1
2:2.20231119-2
2:2.20240202-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:2.20240202-1",
            "binary_name": "selinux-policy-default"
        },
        {
            "binary_version": "2:2.20240202-1",
            "binary_name": "selinux-policy-mls"
        },
        {
            "binary_version": "2:2.20240202-1",
            "binary_name": "selinux-policy-src"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
Ubuntu:25.10
refpolicy

Package

Name
refpolicy
Purl
pkg:deb/ubuntu/refpolicy?arch=source&distro=questing

Affected ranges

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

Affected versions

2:2.*
2:2.20241211-2
2:2.20250213-5
2:2.20250213-6
2:2.20250213-7
2:2.20250213-8
2:2.20250213-9
2:2.20250213-10

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:2.20250213-10",
            "binary_name": "selinux-policy-default"
        },
        {
            "binary_version": "2:2.20250213-10",
            "binary_name": "selinux-policy-mls"
        },
        {
            "binary_version": "2:2.20250213-10",
            "binary_name": "selinux-policy-src"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"
Ubuntu:26.04:LTS
refpolicy

Package

Name
refpolicy
Purl
pkg:deb/ubuntu/refpolicy?arch=source&distro=resolute

Affected ranges

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

Affected versions

2:2.*
2:2.20250213-10
2:2.20250213-11

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2:2.20250213-11",
            "binary_name": "selinux-policy-default"
        },
        {
            "binary_version": "2:2.20250213-11",
            "binary_name": "selinux-policy-mls"
        },
        {
            "binary_version": "2:2.20250213-11",
            "binary_name": "selinux-policy-src"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-24612.json"