USN-7564-1

It was discovered that Samba incorrectly handled certain group membership changes when using Kerberos authentication. A remote user could possibly use this issue to continue to access resources after being removed by an administrator.

References

Affected packages

Ubuntu:25.04 / samba

Package

Name: samba
Purl: pkg:deb/ubuntu/samba@2:4.21.4+dfsg-1ubuntu3.1?arch=source&distro=plucky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2:4.21.4+dfsg-1ubuntu3.1

Affected versions

2:4.*

2:4.20.4+dfsg-1ubuntu1

2:4.20.4+dfsg-1ubuntu2

2:4.20.4+dfsg-1ubuntu3

2:4.20.4+dfsg-1ubuntu5

2:4.21.4+dfsg-1ubuntu2

2:4.21.4+dfsg-1ubuntu3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "ctdb",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "ldb-tools",
            "binary_version": "2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libldb-dev",
            "binary_version": "2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libldb2",
            "binary_version": "2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libnss-winbind",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libpam-winbind",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libsmbclient-dev",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libsmbclient0",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libtalloc-dev",
            "binary_version": "2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libtalloc2",
            "binary_version": "2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libtdb-dev",
            "binary_version": "2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libtdb1",
            "binary_version": "2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libtevent-dev",
            "binary_version": "2:0.16.1+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libtevent0t64",
            "binary_version": "2:0.16.1+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libwbclient-dev",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "libwbclient0",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "python3-ldb",
            "binary_version": "2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "python3-samba",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "python3-talloc",
            "binary_version": "2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "python3-tdb",
            "binary_version": "2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "registry-tools",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-ad-dc",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-ad-provision",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-common",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-common-bin",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-dev",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-dsdb-modules",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-libs",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-testsuite",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-vfs-ceph",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-vfs-glusterfs",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-vfs-modules",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "samba-vfs-modules-extra",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "smbclient",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "tdb-tools",
            "binary_version": "2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1"
        },
        {
            "binary_name": "winbind",
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

cves_map

{
    "cves": [
        {
            "id": "CVE-2025-0620",
            "severity": [
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"
                },
                {
                    "type": "CVSS_V3",
                    "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"
                },
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:25.04"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7564-1.json"