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{"acknowledgement": "Red Hat would like to thank the Samba project for reporting this issue. Upstream acknowledges Stefan Metzmacher as the original reporter.", "affected_release": [{"advisory": "RHSA-2016:1487", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "samba4-0:4.2.10-7.el6_8", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2016-07-26T00:00:00Z"}, {"advisory": "RHSA-2016:1486", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "samba-0:4.2.10-7.el7_2", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2016-07-26T00:00:00Z"}, {"advisory": "RHSA-2016:1494", "cpe": "cpe:/a:redhat:storage:3.1:samba:el6", "package": "samba-0:4.4.3-8.el6rhs", "product_name": "Red Hat Gluster Storage 3.1 for RHEL 6", "release_date": "2016-07-26T00:00:00Z"}, {"advisory": "RHSA-2016:1494", "cpe": "cpe:/a:redhat:storage:3.1:samba:el7", "package": "samba-0:4.4.3-8.el7rhgs", "product_name": "Red Hat Gluster Storage 3.1 for RHEL 7", "release_date": "2016-07-26T00:00:00Z"}], "bugzilla": {"description": "samba: Client side SMB2/3 required signing can be downgraded", "id": "1351955", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1351955"}, "csaw": false, "cvss": {"cvss_base_score": "5.4", "cvss_scoring_vector": "AV:A/AC:M/Au:N/C:P/I:P/A:P", "status": "verified"}, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "details": ["libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the (1) SMB2_SESSION_FLAG_IS_GUEST or (2) SMB2_SESSION_FLAG_IS_NULL flag.", "A flaw was found in the way Samba initiated signed DCE/RPC connections. A man-in-the-middle attacker could use this flaw to downgrade the connection to not use signing and therefore impersonate the server."], "name": "CVE-2016-2119", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2016-07-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2016-2119\nhttps://nvd.nist.gov/vuln/detail/CVE-2016-2119"], "threat_severity": "Moderate", "upstream_fix": "samba 4.4.5, samba 4.3.11, samba 4.2.14"}