A flaw was found in samba versions 4.9.x up to 4.9.13, samba 4.10.x up to 4.10.8 and samba 4.11.x up to 4.11.0rc3, when certain parameters were set in the samba configuration file. An unauthenticated attacker could use this flaw to escape the shared directory and access the contents of directories outside the share.
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libwbclient-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-libs": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "registry-tools": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-common-bin": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libwbclient0-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-dsdb-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libpam-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libnss-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-vfs-modules": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-common-bin-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-testsuite": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "smbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libsmbclient": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libsmbclient-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libwbclient0": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libparse-pidl-perl-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-dsdb-modules": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "registry-tools-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-vfs-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "python-samba": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "ctdb": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libsmbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libnss-winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libsmbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-libs-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-dbg": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-testsuite-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-common": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libpam-winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "smbclient": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libwbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "samba-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "libparse-pidl-perl": "2:4.3.11+dfsg-0ubuntu0.16.04.21", "ctdb-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.21" } ] }
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libwbclient-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-libs": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "registry-tools": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-common-bin": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "libwbclient0-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-dsdb-modules-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "libpam-winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "libnss-winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-vfs-modules": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "python-samba-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-common-bin-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-testsuite": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "smbclient-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "libsmbclient": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "libwbclient0": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "libsmbclient-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "python-samba": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-dsdb-modules": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "registry-tools-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-vfs-modules-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "ctdb": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "libnss-winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "libsmbclient-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-libs-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-testsuite-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-common": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "libpam-winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "smbclient": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "samba-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "libparse-pidl-perl": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11", "ctdb-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.11" } ] }