A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.
{ "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro", "ubuntu_priority": "medium", "binaries": [ { "libwbclient-dev": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-libs": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "registry-tools": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-common-bin": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libsmbsharemodes0-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libwbclient0-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libpam-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libnss-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-doc": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libsmbsharemodes0": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-vfs-modules": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "winbind": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "python-samba-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-dsdb-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libsmbsharemodes-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-common-bin-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-testsuite": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "smbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libsmbclient": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libsmbsharemodes-dev": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libsmbclient-dev": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libwbclient0": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libparse-pidl-perl-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-dsdb-modules": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "registry-tools-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-vfs-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "python-samba": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libpam-smbpass-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libsmbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libnss-winbind": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libsmbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-libs-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-dbg": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-testsuite-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-common": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libpam-winbind": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "smbclient": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libwbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "samba-dev": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libparse-pidl-perl": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7", "libpam-smbpass": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libwbclient-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-libs": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "registry-tools": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-common-bin": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libwbclient0-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-dsdb-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libpam-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libnss-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-vfs-modules": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-common-bin-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-testsuite": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "smbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libsmbclient": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libsmbclient-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libwbclient0": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libparse-pidl-perl-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-dsdb-modules": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "registry-tools-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-vfs-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "python-samba": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "ctdb": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libsmbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libnss-winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libsmbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-libs-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-dbg": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-testsuite-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-common": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libpam-winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "smbclient": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libwbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "samba-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "libparse-pidl-perl": "2:4.3.11+dfsg-0ubuntu0.16.04.28", "ctdb-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.28" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libwbclient-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-libs": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "registry-tools": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-common-bin": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "libwbclient0-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-dsdb-modules-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "libpam-winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "libnss-winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-vfs-modules": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "python-samba-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-common-bin-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-testsuite": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "smbclient-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "libsmbclient": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "libwbclient0": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "libsmbclient-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "python-samba": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-dsdb-modules": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "registry-tools-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-vfs-modules-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "ctdb": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "libnss-winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "libsmbclient-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-libs-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-testsuite-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-common": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "libpam-winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "smbclient": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "samba-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "libparse-pidl-perl": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17", "ctdb-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.17" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libwbclient-dev": "2:4.11.6+dfsg-0ubuntu1.3", "samba-libs": "2:4.11.6+dfsg-0ubuntu1.3", "registry-tools": "2:4.11.6+dfsg-0ubuntu1.3", "samba-common-bin": "2:4.11.6+dfsg-0ubuntu1.3", "libwbclient0-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "samba-dsdb-modules-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "libpam-winbind-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "libnss-winbind-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "python3-samba-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "winbind": "2:4.11.6+dfsg-0ubuntu1.3", "samba-vfs-modules": "2:4.11.6+dfsg-0ubuntu1.3", "samba-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "samba-common-bin-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "samba-testsuite": "2:4.11.6+dfsg-0ubuntu1.3", "smbclient-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "libsmbclient": "2:4.11.6+dfsg-0ubuntu1.3", "samba": "2:4.11.6+dfsg-0ubuntu1.3", "libsmbclient-dev": "2:4.11.6+dfsg-0ubuntu1.3", "libwbclient0": "2:4.11.6+dfsg-0ubuntu1.3", "samba-dsdb-modules": "2:4.11.6+dfsg-0ubuntu1.3", "python3-samba": "2:4.11.6+dfsg-0ubuntu1.3", "samba-vfs-modules-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "registry-tools-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "ctdb": "2:4.11.6+dfsg-0ubuntu1.3", "libnss-winbind": "2:4.11.6+dfsg-0ubuntu1.3", "libsmbclient-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "samba-libs-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "winbind-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "samba-testsuite-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3", "samba-common": "2:4.11.6+dfsg-0ubuntu1.3", "libpam-winbind": "2:4.11.6+dfsg-0ubuntu1.3", "smbclient": "2:4.11.6+dfsg-0ubuntu1.3", "samba-dev": "2:4.11.6+dfsg-0ubuntu1.3", "ctdb-dbgsym": "2:4.11.6+dfsg-0ubuntu1.3" } ] }