FKIE_CVE-2015-5296
Vulnerability from fkie_nvd - Published: 2015-12-29 22:59 - Updated: 2026-06-17 00:28
Severity
Summary
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| samba | samba | * | |
| samba | samba | * | |
| samba | samba | * | |
| debian | debian_linux | 7.0 | |
| debian | debian_linux | 8.0 | |
| canonical | ubuntu_linux | 12.04 | |
| canonical | ubuntu_linux | 14.04 | |
| canonical | ubuntu_linux | 15.04 | |
| canonical | ubuntu_linux | 15.10 |
{
"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",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*",
"matchCriteriaId": "CB66DB75-2B16-4EBF-9B93-CE49D8086E41",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*",
"matchCriteriaId": "815D70A8-47D3-459C-A32C-9FEACA0659D1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*",
"matchCriteriaId": "F38D3B7E-8429-473F-BB31-FC3583EE5A5B",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*",
"matchCriteriaId": "E88A537F-F4D0-46B9-9E37-965233C2A355",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"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,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.2,
"impactScore": 2.7,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2015-12-29T22:59:02.247",
"references": [
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://www.debian.org/security/2016/dsa-3433"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/79732"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1034493"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ubuntu.com/usn/USN-2855-1"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ubuntu.com/usn/USN-2855-2"
},
{
"source": "secalert@redhat.com",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1290292"
},
{
"source": "secalert@redhat.com",
"url": "https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=1ba49b8f389eda3414b14410c7fbcb4041ca06b1"
},
{
"source": "secalert@redhat.com",
"url": "https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=a819d2b440aafa3138d95ff6e8b824da885a70e9"
},
{
"source": "secalert@redhat.com",
"url": "https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=d724f835acb9f4886c0001af32cd325dbbf1f895"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993"
},
{
"source": "secalert@redhat.com",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/201612-47"
},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "https://www.samba.org/samba/security/CVE-2015-5296.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174076.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174391.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00019.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00020.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00032.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00033.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00002.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00017.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.debian.org/security/2016/dsa-3433"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/79732"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "http://www.securitytracker.com/id/1034493"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ubuntu.com/usn/USN-2855-1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ubuntu.com/usn/USN-2855-2"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1290292"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=1ba49b8f389eda3414b14410c7fbcb4041ca06b1"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=a819d2b440aafa3138d95ff6e8b824da885a70e9"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://git.samba.org/?p=samba.git%3Ba=commit%3Bh=d724f835acb9f4886c0001af32cd325dbbf1f895"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "https://security.gentoo.org/glsa/201612-47"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"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"
}
]
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…