CVE-2016-2119

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "matchCriteriaId": "E6FD4346-FDE6-40F8-AAC5-F72ED275E4F3", "versionEndExcluding": "4.2.14", "versionStartIncluding": "4.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "matchCriteriaId": "549834A6-DDF7-4C48-9626-EEF4668AE77C", "versionEndExcluding": "4.3.11", "versionStartIncluding": "4.3.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "matchCriteriaId": "D45F68E2-A9BF-4B0C-9699-3D4D9419B405", "versionEndExcluding": "4.4.5", "versionStartIncluding": "4.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "ibcli/smb/smbXcli_base.c en Samba 4.x en versiones anteriores a 4.2.14, 4.3.x en versiones anteriores a 4.3.11 y 4.4.x en versiones anteriores a 4.4.5 permite a atacantes man-in-the-middle eludir el mecanismo de protecci\u00f3n de firmado de cliente y consecuentemente suplantar los servidores SMB2 y SMB3, a trav\u00e9s de los indicadores (1) SMB2_SESSION_FLAG_IS_GUEST o (2) SMB2_SESSION_FLAG_IS_NULL."}], "id": "CVE-2016-2119", "lastModified": "2026-06-17T00:43:29.830", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2016-07-07T15:59:00.133", "references": [{"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-updates/2016-07/msg00060.html"}, 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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"}

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