A flaw was found when using samba as an Active Directory Domain Controller. Due to the way samba handles certain requests as an Active Directory Domain Controller LDAP server, an unauthorized user can cause a stack overflow leading to a denial of service. The highest threat from this vulnerability is to system availability. This issue affects all samba versions before 4.10.15, before 4.11.8 and before 4.12.2.
{ "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+esm6", "samba-libs": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "registry-tools": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-common-bin": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libsmbsharemodes0-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libwbclient0-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libpam-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libnss-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-doc": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libsmbsharemodes0": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-vfs-modules": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "winbind": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "python-samba-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-dsdb-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libsmbsharemodes-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-common-bin-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-testsuite": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "smbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libsmbclient": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libsmbsharemodes-dev": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libsmbclient-dev": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libwbclient0": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libparse-pidl-perl-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-dsdb-modules": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "registry-tools-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-vfs-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "python-samba": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libpam-smbpass-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libsmbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libnss-winbind": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libsmbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-libs-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-dbg": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-testsuite-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-common": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libpam-winbind": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "smbclient": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libwbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "samba-dev": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libparse-pidl-perl": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6", "libpam-smbpass": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libwbclient-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-libs": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "registry-tools": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-common-bin": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libwbclient0-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-dsdb-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libpam-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libnss-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-vfs-modules": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-common-bin-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-testsuite": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "smbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libsmbclient": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libsmbclient-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libwbclient0": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libparse-pidl-perl-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-dsdb-modules": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "registry-tools-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-vfs-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "python-samba": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "ctdb": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libsmbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libnss-winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libsmbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-libs-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-dbg": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-testsuite-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-common": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libpam-winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "smbclient": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libwbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "samba-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "libparse-pidl-perl": "2:4.3.11+dfsg-0ubuntu0.16.04.26", "ctdb-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.26" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libwbclient-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-libs": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "registry-tools": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-common-bin": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "libwbclient0-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-dsdb-modules-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "libpam-winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "libnss-winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-vfs-modules": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "python-samba-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-common-bin-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-testsuite": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "smbclient-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "libsmbclient": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "libwbclient0": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "libsmbclient-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "python-samba": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-dsdb-modules": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "registry-tools-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-vfs-modules-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "ctdb": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "libnss-winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "libsmbclient-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-libs-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-testsuite-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-common": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "libpam-winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "smbclient": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "samba-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "libparse-pidl-perl": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16", "ctdb-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libwbclient-dev": "2:4.11.6+dfsg-0ubuntu1.1", "samba-libs": "2:4.11.6+dfsg-0ubuntu1.1", "registry-tools": "2:4.11.6+dfsg-0ubuntu1.1", "samba-common-bin": "2:4.11.6+dfsg-0ubuntu1.1", "libwbclient0-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "samba-dsdb-modules-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "libpam-winbind-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "libnss-winbind-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "python3-samba-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "winbind": "2:4.11.6+dfsg-0ubuntu1.1", "samba-vfs-modules": "2:4.11.6+dfsg-0ubuntu1.1", "samba-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "samba-common-bin-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "samba-testsuite": "2:4.11.6+dfsg-0ubuntu1.1", "smbclient-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "libsmbclient": "2:4.11.6+dfsg-0ubuntu1.1", "samba": "2:4.11.6+dfsg-0ubuntu1.1", "libsmbclient-dev": "2:4.11.6+dfsg-0ubuntu1.1", "libwbclient0": "2:4.11.6+dfsg-0ubuntu1.1", "samba-dsdb-modules": "2:4.11.6+dfsg-0ubuntu1.1", "python3-samba": "2:4.11.6+dfsg-0ubuntu1.1", "samba-vfs-modules-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "registry-tools-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "ctdb": "2:4.11.6+dfsg-0ubuntu1.1", "libnss-winbind": "2:4.11.6+dfsg-0ubuntu1.1", "libsmbclient-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "samba-libs-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "winbind-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "samba-testsuite-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1", "samba-common": "2:4.11.6+dfsg-0ubuntu1.1", "libpam-winbind": "2:4.11.6+dfsg-0ubuntu1.1", "smbclient": "2:4.11.6+dfsg-0ubuntu1.1", "samba-dev": "2:4.11.6+dfsg-0ubuntu1.1", "ctdb-dbgsym": "2:4.11.6+dfsg-0ubuntu1.1" } ] }