UBUNTU-CVE-2021-40818

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Source
https://ubuntu.com/security/CVE-2021-40818
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40818.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-40818
Upstream
Published
2021-09-08T22:15:00Z
Modified
2025-10-24T04:50:34Z
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

scheme/webauthn.c in Glewlwyd SSO server through 2.5.3 has a buffer overflow during FIDO2 signature validation in webauthn registration.

References

Affected packages

Ubuntu:18.04:LTS / glewlwyd

Package

Name
glewlwyd
Purl
pkg:deb/ubuntu/glewlwyd@1.3.1-1?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.1-2ubuntu1
1.2.2-1
1.3.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "fonts-glewlwyd",
            "binary_version": "1.3.1-1"
        },
        {
            "binary_name": "glewlwyd",
            "binary_version": "1.3.1-1"
        },
        {
            "binary_name": "glewlwyd-common",
            "binary_version": "1.3.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40818.json"

Ubuntu:20.04:LTS / glewlwyd

Package

Name
glewlwyd
Purl
pkg:deb/ubuntu/glewlwyd@1.4.9-3?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.4.9-2
1.4.9-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "fonts-glewlwyd",
            "binary_version": "1.4.9-3"
        },
        {
            "binary_name": "glewlwyd",
            "binary_version": "1.4.9-3"
        },
        {
            "binary_name": "glewlwyd-common",
            "binary_version": "1.4.9-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40818.json"

Ubuntu:22.04:LTS / glewlwyd

Package

Name
glewlwyd
Purl
pkg:deb/ubuntu/glewlwyd@2.6.1-1build1?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.5.2-3
2.6.1-1
2.6.1-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "glewlwyd",
            "binary_version": "2.6.1-1build1"
        },
        {
            "binary_name": "glewlwyd-common",
            "binary_version": "2.6.1-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-40818.json"