A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.
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{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libwbclient-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-libs": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "registry-tools": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-common-bin": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "libwbclient0-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-dsdb-modules-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "libpam-winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "libnss-winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-vfs-modules": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "python-samba-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-common-bin-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-testsuite": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "smbclient-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "libsmbclient": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "libwbclient0": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "libsmbclient-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "python-samba": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-dsdb-modules": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "registry-tools-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-vfs-modules-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "ctdb": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "libnss-winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "libsmbclient-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-libs-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-testsuite-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-common": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "libpam-winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "smbclient": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "samba-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "libparse-pidl-perl": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2", "ctdb-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.2" } ] }