{"id":"UBUNTU-CVE-2018-1139","details":"A flaw was found in the way samba before 4.7.9 and 4.8.4 allowed the use of weak NTLMv1 authentication even when NTLMv1 was explicitly disabled. A man-in-the-middle attacker could use this flaw to read the credential and other details passed between the samba server and client.","modified":"2026-02-04T03:14:03.164102Z","published":"2018-08-14T00:00:00Z","related":["USN-3738-1"],"upstream":["CVE-2018-1139"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-1139"},{"type":"REPORT","url":"https://www.samba.org/samba/security/CVE-2018-1139.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3738-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-1139"}],"affected":[{"package":{"name":"samba","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/samba@2:4.7.6+dfsg~ubuntu-0ubuntu2.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"}]}],"versions":["2:4.6.7+dfsg-1ubuntu3","2:4.7.1+dfsg-1ubuntu1","2:4.7.3+dfsg-1ubuntu1","2:4.7.4+dfsg-1ubuntu1","2:4.7.6+dfsg~ubuntu-0ubuntu1","2:4.7.6+dfsg~ubuntu-0ubuntu2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"ctdb","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"libnss-winbind","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"libpam-winbind","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"libparse-pidl-perl","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"libsmbclient","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"libsmbclient-dev","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"libwbclient-dev","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"libwbclient0","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"python-samba","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"registry-tools","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"samba","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"samba-common","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"samba-common-bin","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"samba-dev","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"samba-dsdb-modules","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"samba-libs","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"samba-testsuite","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"samba-vfs-modules","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"smbclient","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"},{"binary_name":"winbind","binary_version":"2:4.7.6+dfsg~ubuntu-0ubuntu2.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-1139.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}