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", "binaries": [ { "binary_name": "libnss-winbind", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libnss-winbind-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libpam-smbpass", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libpam-smbpass-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libpam-winbind", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libpam-winbind-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libparse-pidl-perl", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libparse-pidl-perl-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libsmbclient", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libsmbclient-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libsmbclient-dev", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libsmbclient-dev-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libsmbsharemodes-dev", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libsmbsharemodes-dev-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libsmbsharemodes0", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libsmbsharemodes0-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libwbclient-dev", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libwbclient-dev-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libwbclient0", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "libwbclient0-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "python-samba", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "python-samba-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "registry-tools", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "registry-tools-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-common", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-common-bin", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-common-bin-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-dbg", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-dev", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-dev-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-doc", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-dsdb-modules", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-dsdb-modules-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-libs", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-libs-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-testsuite", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-testsuite-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-vfs-modules", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "samba-vfs-modules-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "smbclient", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "smbclient-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "winbind", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" }, { "binary_name": "winbind-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.14.04.20+esm6" } ], "ubuntu_priority": "medium" }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "ctdb", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "ctdb-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libnss-winbind", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libnss-winbind-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libpam-winbind", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libpam-winbind-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libparse-pidl-perl", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libparse-pidl-perl-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libsmbclient", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libsmbclient-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libsmbclient-dev", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libsmbclient-dev-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libwbclient-dev", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libwbclient-dev-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libwbclient0", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "libwbclient0-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "python-samba", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "registry-tools", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "registry-tools-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-common", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-common-bin", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-common-bin-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-dbg", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-dev", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-dev-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-dsdb-modules", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-dsdb-modules-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-libs", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-libs-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-testsuite", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-testsuite-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-vfs-modules", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "samba-vfs-modules-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "smbclient", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "smbclient-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "winbind", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" }, { "binary_name": "winbind-dbgsym", "binary_version": "2:4.3.11+dfsg-0ubuntu0.16.04.26" } ], "ubuntu_priority": "medium" }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "ctdb", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "ctdb-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libnss-winbind", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libnss-winbind-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libpam-winbind", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libpam-winbind-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libparse-pidl-perl", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libsmbclient", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libsmbclient-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libsmbclient-dev", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libwbclient-dev", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libwbclient0", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "libwbclient0-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "python-samba", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "python-samba-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "registry-tools", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "registry-tools-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-common", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-common-bin", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-common-bin-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-dev", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-dsdb-modules", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-dsdb-modules-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-libs", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-libs-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-testsuite", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-testsuite-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-vfs-modules", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "samba-vfs-modules-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "smbclient", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "smbclient-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "winbind", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" }, { "binary_name": "winbind-dbgsym", "binary_version": "2:4.7.6+dfsg~ubuntu-0ubuntu2.16" } ], "ubuntu_priority": "medium" }
{ "availability": "No subscription required", "binaries": [ { "binary_name": "ctdb", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "ctdb-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "libnss-winbind", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "libnss-winbind-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "libpam-winbind", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "libpam-winbind-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "libsmbclient", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "libsmbclient-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "libsmbclient-dev", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "libwbclient-dev", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "libwbclient0", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "libwbclient0-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "python3-samba", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "python3-samba-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "registry-tools", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "registry-tools-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-common", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-common-bin", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-common-bin-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-dev", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-dsdb-modules", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-dsdb-modules-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-libs", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-libs-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-testsuite", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-testsuite-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-vfs-modules", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "samba-vfs-modules-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "smbclient", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "smbclient-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "winbind", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" }, { "binary_name": "winbind-dbgsym", "binary_version": "2:4.11.6+dfsg-0ubuntu1.1" } ], "ubuntu_priority": "medium" }