USN-5034-2

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:Pro:16.04:LTS / c-ares

Package

Name: c-ares
Purl: pkg:deb/ubuntu/c-ares@1.10.0-3ubuntu0.2+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.10.0-3ubuntu0.2+esm1

Affected versions

1.*

1.10.0-2

1.10.0-3

1.10.0-3ubuntu0.1

1.10.0-3ubuntu0.2

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "1.10.0-3ubuntu0.2+esm1",
            "binary_name": "libc-ares-dev"
        },
        {
            "binary_version": "1.10.0-3ubuntu0.2+esm1",
            "binary_name": "libc-ares2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5034-2.json"

cves_map

{
    "cves": [
        {
            "id": "CVE-2021-3672",
            "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"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:16.04:LTS"
}