UBUNTU-CVE-2018-20340

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Source
https://ubuntu.com/security/CVE-2018-20340
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20340.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2018-20340
Upstream
Published
2019-02-08T11:00:00Z
Modified
2025-10-24T04:47:18Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Yubico libu2f-host 1.1.6 contains unchecked buffers in devs.c, which could enable a malicious token to exploit a buffer overflow. An attacker could use this to attempt to execute malicious code using a crafted USB device masquerading as a security token on a computer where the affected library is currently in use. It is not possible to perform this attack with a genuine YubiKey.

References

Affected packages

Ubuntu:16.04:LTS / libu2f-host

Package

Name
libu2f-host
Purl
pkg:deb/ubuntu/libu2f-host@1.0.0-1?arch=source&distro=xenial

Affected ranges

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

Affected versions

0.*

0.0.4-1

1.*

1.0.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libu2f-host-dev",
            "binary_version": "1.0.0-1"
        },
        {
            "binary_name": "libu2f-host0",
            "binary_version": "1.0.0-1"
        },
        {
            "binary_name": "u2f-host",
            "binary_version": "1.0.0-1"
        }
    ]
}

Ubuntu:18.04:LTS / libu2f-host

Package

Name
libu2f-host
Purl
pkg:deb/ubuntu/libu2f-host@1.1.4-1ubuntu0.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.1.4-1ubuntu0.1

Affected versions

1.*

1.1.3-1
1.1.4-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libu2f-host-dev",
            "binary_version": "1.1.4-1ubuntu0.1"
        },
        {
            "binary_name": "libu2f-host0",
            "binary_version": "1.1.4-1ubuntu0.1"
        },
        {
            "binary_name": "libu2f-udev",
            "binary_version": "1.1.4-1ubuntu0.1"
        },
        {
            "binary_name": "u2f-host",
            "binary_version": "1.1.4-1ubuntu0.1"
        }
    ]
}