USN-5034-1

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Source
https://ubuntu.com/security/notices/USN-5034-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5034-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-5034-1
Upstream
Related
Published
2021-08-10T11:53:27.990904Z
Modified
2025-10-13T04:35:35Z
Summary
c-ares vulnerability
Details

Philipp Jeitner and Haya Shulman discovered that c-ares incorrectly validated certain hostnames returned by DNS servers. A remote attacker could possibly use this issue to perform Domain Hijacking attacks.

References

Affected packages

Ubuntu:18.04:LTS / c-ares

Package

Name
c-ares
Purl
pkg:deb/ubuntu/c-ares@1.14.0-1ubuntu0.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.14.0-1ubuntu0.1

Affected versions

1.*

1.13.0-2
1.13.0-3
1.14.0-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.14.0-1ubuntu0.1",
            "binary_name": "libc-ares-dev"
        },
        {
            "binary_version": "1.14.0-1ubuntu0.1",
            "binary_name": "libc-ares2"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:18.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2021-3672"
        }
    ]
}

Ubuntu:20.04:LTS / c-ares

Package

Name
c-ares
Purl
pkg:deb/ubuntu/c-ares@1.15.0-1ubuntu0.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.15.0-1ubuntu0.1

Affected versions

1.*

1.15.0-1build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "1.15.0-1ubuntu0.1",
            "binary_name": "libc-ares-dev"
        },
        {
            "binary_version": "1.15.0-1ubuntu0.1",
            "binary_name": "libc-ares2"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:20.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2021-3672"
        }
    ]
}