CVE-2015-5296

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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": "B2B09153-EB3D-4DBB-BA55-C021359F0D8D", "versionEndExcluding": "4.1.22", "versionStartIncluding": "3.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "matchCriteriaId": "AEE374EB-8CEF-4E2E-B323-22397E34BD4A", "versionEndExcluding": "4.2.7", "versionStartIncluding": "4.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*", "matchCriteriaId": "6683E050-3788-41B4-BA5D-32ACDFE79648", "versionEndExcluding": "4.3.3", "versionStartIncluding": "4.3.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA", 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supports connections that are encrypted but unsigned, which allows man-in-the-middle attackers to conduct encrypted-to-unencrypted downgrade attacks by modifying the client-server data stream, related to clidfs.c, libsmb_server.c, and smbXcli_base.c."}, {"lang": "es", "value": "Samba 3.x y 4.x en versiones anteriores a 4.1.22, 4.2.x en versiones anteriores a 4.2.7 y 4.3.x en versiones anteriores a 4.3.3 admite conexiones que est\u00e1n cifradas pero no firmadas, lo que permite a atacantes man-in-the-middle llevar a cabo un ataque de degradaci\u00f3n de cifrado-a-descifrado modificando el flujo de datos cliente-servidor, relacionado con clidfs.c, libsmb_server.c y smbXcli_base.c."}], "id": "CVE-2015-5296", "lastModified": "2026-06-17T00:28:50.273", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, 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["Vendor Advisory"], "url": "https://www.samba.org/samba/security/CVE-2015-5296.html"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Samba project for reporting this issue. Upstream acknowledges Sernet.de and Stefan Metzmacher (Samba Team) as the original reporters.", "affected_release": [{"advisory": "RHSA-2016:0010", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "samba4-0:4.0.0-67.el6_7.rc4", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2016-01-07T00:00:00Z"}, {"advisory": "RHSA-2016:0011", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "samba-0:3.6.23-24.el6_7", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2016-01-07T00:00:00Z"}, {"advisory": "RHSA-2016:0006", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "samba-0:4.2.3-11.el7_2", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2016-01-08T00:00:00Z"}, {"advisory": "RHSA-2016:0015", "cpe": "cpe:/a:redhat:storage:3.1:samba:el6", "package": "samba-0:4.1.17-16.el6rhs", "product_name": "Red Hat Gluster Storage 3.1 for RHEL 6", "release_date": "2016-01-08T00:00:00Z"}, {"advisory": "RHSA-2016:0016", "cpe": "cpe:/a:redhat:storage:3.1:samba:el7", "package": "samba-0:4.2.4-9.1.el7rhgs", "product_name": "Red Hat Gluster Storage 3.1 for RHEL 7", "release_date": "2016-01-08T00:00:00Z"}], "bugzilla": {"description": "samba: client requesting encryption vulnerable to downgrade attack", "id": "1290292", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1290292"}, "csaw": false, "cvss": {"cvss_base_score": "5.8", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "status": "verified"}, "cwe": "CWE-345", "details": ["Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3 supports connections that are encrypted but unsigned, which allows man-in-the-middle attackers to conduct encrypted-to-unencrypted downgrade attacks by modifying the client-server data stream, related to clidfs.c, libsmb_server.c, and smbXcli_base.c.", "A man-in-the-middle vulnerability was found in the way \"connection signing\" was implemented by Samba. A remote attacker could use this flaw to downgrade an existing Samba client connection and force the use of plain text."], "name": "CVE-2015-5296", "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:5", "fix_state": "Will not fix", "package_name": "samba3x", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2015-12-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-5296\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-5296\nhttps://www.samba.org/samba/security/CVE-2015-5296.html"], "threat_severity": "Moderate"}

{}