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

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "ctdb"
        },
        {
            "binary_version": "2:2.10.0+samba4.21.4+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": "2:4.21.4+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": "2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "libtalloc-dev"
        },
        {
            "binary_version": "2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "libtalloc2"
        },
        {
            "binary_version": "2:1.4.12+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": "2:0.16.1+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": "2:4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "libwbclient-dev"
        },
        {
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "libwbclient0"
        },
        {
            "binary_version": "2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "python3-ldb"
        },
        {
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "python3-samba"
        },
        {
            "binary_version": "2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "python3-talloc"
        },
        {
            "binary_version": "2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "python3-tdb"
        },
        {
            "binary_version": "2:4.21.4+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": "2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "tdb-tools"
        },
        {
            "binary_version": "2:4.21.4+dfsg-1ubuntu3.1",
            "binary_name": "winbind"
        }
    ]
}

Database specific

source

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

cves_map

{
    "cves": [
        {
            "severity": [
                {
                    "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": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-0620"
        }
    ],
    "ecosystem": "Ubuntu:25.04"
}