All Samba versions 4.x.x before 4.9.17, 4.10.x before 4.10.11 and 4.11.x before 4.11.3 have an issue, where the S4U (MS-SFU) Kerberos delegation model includes a feature allowing for a subset of clients to be opted out of constrained delegation in any way, either S4U2Self or regular Kerberos authentication, by forcing all tickets for these clients to be non-forwardable. In AD this is implemented by a user attribute delegationnotallowed (aka not-delegated), which translates to disallow-forwardable. However the Samba AD DC does not do that for S4U2Self and does set the forwardable flag even if the impersonated client has the not-delegated flag set.
{
"unresolved_ranges": [
{
"cpe": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*",
"extracted_events": [
{
"last_affected": "14.04"
}
],
"source": "CPE_FIELD"
},
{
"cpe": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*",
"extracted_events": [
{
"last_affected": "16.04"
}
],
"source": "CPE_FIELD"
},
{
"cpe": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"extracted_events": [
{
"last_affected": "18.04"
}
],
"source": "CPE_FIELD"
},
{
"cpe": "cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "19.04"
}
],
"source": "CPE_FIELD"
},
{
"cpe": "cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "19.10"
}
],
"source": "CPE_FIELD"
},
{
"cpe": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "10.0"
}
],
"source": "CPE_FIELD"
},
{
"cpe": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "9.0"
}
],
"source": "CPE_FIELD"
},
{
"cpe": "cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "30"
}
],
"source": "CPE_FIELD"
},
{
"cpe": "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "31"
}
],
"source": "CPE_FIELD"
},
{
"cpe": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
"extracted_events": [
{
"last_affected": "15.1"
}
],
"source": "CPE_FIELD"
}
]
}{
"cpe": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.9.17"
},
{
"introduced": "4.10.0"
},
{
"fixed": "4.10.11"
},
{
"introduced": "4.11.0"
},
{
"fixed": "4.11.3"
}
],
"source": "CPE_FIELD"
}