UBUNTU-CVE-2019-12290

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2019-12290
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-12290.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2019-12290
Upstream
Downstream
Related
Published
2019-10-22T16:15:00Z
Modified
2025-09-08T16:45:26Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

GNU libidn2 before 2.2.0 fails to perform the roundtrip checks specified in RFC3490 Section 4.2 when converting A-labels to U-labels. This makes it possible in some circumstances for one domain to impersonate another. By creating a malicious domain that matches a target domain except for the inclusion of certain punycoded Unicode characters (that would be discarded when converted first to a Unicode label and then back to an ASCII label), arbitrary domains can be impersonated.

References

Affected packages

Ubuntu:Pro:14.04:LTS / libidn2-0

Package

Name
libidn2-0
Purl
pkg:deb/ubuntu/libidn2-0@0.9-1ubuntu0.1~esm1?arch=source&distro=esm-infra-legacy/trusty

Affected ranges

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

Affected versions

0.*

0.9-1
0.9-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "idn2",
            "binary_version": "0.9-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libidn2-0",
            "binary_version": "0.9-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libidn2-0-dev",
            "binary_version": "0.9-1ubuntu0.1~esm1"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / libidn2-0

Package

Name
libidn2-0
Purl
pkg:deb/ubuntu/libidn2-0@0.10-3ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial

Affected ranges

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

Affected versions

0.*

0.10-3
0.10-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "idn2",
            "binary_version": "0.10-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "libidn2-0",
            "binary_version": "0.10-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "libidn2-0-dev",
            "binary_version": "0.10-3ubuntu0.1~esm1"
        }
    ]
}

Ubuntu:18.04:LTS / libidn2

Package

Name
libidn2
Purl
pkg:deb/ubuntu/libidn2@2.0.4-1.1ubuntu0.2?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.0.4-1.1ubuntu0.2

Affected versions

2.*

2.0.4-1
2.0.4-1.1
2.0.4-1.1build2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "idn2",
            "binary_version": "2.0.4-1.1ubuntu0.2"
        },
        {
            "binary_name": "libidn2-0",
            "binary_version": "2.0.4-1.1ubuntu0.2"
        },
        {
            "binary_name": "libidn2-0-dev",
            "binary_version": "2.0.4-1.1ubuntu0.2"
        },
        {
            "binary_name": "libidn2-dev",
            "binary_version": "2.0.4-1.1ubuntu0.2"
        }
    ]
}