FKIE_CVE-2016-6305
Vulnerability from fkie_nvd - Published: 2016-09-26 19:59 - Updated: 2026-06-17 00:50
Severity
Summary
The ssl3_read_bytes function in record/rec_layer_s3.c in OpenSSL 1.1.0 before 1.1.0a allows remote attackers to cause a denial of service (infinite loop) by triggering a zero-length record in an SSL_peek call.
References
{
"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:openssl:openssl:1.1.0:*:*:*:*:*:*:*",
"matchCriteriaId": "73104834-5810-48DD-9B97-549D223853F1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The ssl3_read_bytes function in record/rec_layer_s3.c in OpenSSL 1.1.0 before 1.1.0a allows remote attackers to cause a denial of service (infinite loop) by triggering a zero-length record in an SSL_peek call."
},
{
"lang": "es",
"value": "La funci\u00f3n ssl3_read_bytes en record/rec_layer_s3.c en OpenSSL 1.1.0 en versiones anteriores a 1.1.0a permite a atacantes remotos provocar una denegaci\u00f3n de servicio (bucle infinito) desencadenando un registro de longitud cero en una llamada SSL_peek."
}
],
"id": "CVE-2016-6305",
"lastModified": "2026-06-17T00:50:47.700",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5.0,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.0"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2016-09-26T19:59:01.597",
"references": [
{
"source": "secalert@redhat.com",
"url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10759"
},
{
"source": "secalert@redhat.com",
"url": "http://www-01.ibm.com/support/docview.wss?uid=swg21995039"
},
{
"source": "secalert@redhat.com",
"url": "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html"
},
{
"source": "secalert@redhat.com",
"url": "http://www.securityfocus.com/bid/93149"
},
{
"source": "secalert@redhat.com",
"url": "http://www.securitytracker.com/id/1036879"
},
{
"source": "secalert@redhat.com",
"url": "https://bto.bluecoat.com/security-advisory/sa132"
},
{
"source": "secalert@redhat.com",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
},
{
"source": "secalert@redhat.com",
"url": "https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=63658103d4441924f8dbfc517b99bb54758a98b9"
},
{
"source": "secalert@redhat.com",
"tags": [
"Exploit",
"Issue Tracking"
],
"url": "https://github.com/openssl/openssl/issues/1563"
},
{
"source": "secalert@redhat.com",
"url": "https://security.gentoo.org/glsa/201612-16"
},
{
"source": "secalert@redhat.com",
"tags": [
"Vendor Advisory"
],
"url": "https://www.openssl.org/news/secadv/20160922.txt"
},
{
"source": "secalert@redhat.com",
"url": "https://www.tenable.com/security/tns-2016-16"
},
{
"source": "secalert@redhat.com",
"url": "https://www.tenable.com/security/tns-2016-20"
},
{
"source": "secalert@redhat.com",
"url": "https://www.tenable.com/security/tns-2016-21"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10759"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www-01.ibm.com/support/docview.wss?uid=swg21995039"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/93149"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securitytracker.com/id/1036879"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bto.bluecoat.com/security-advisory/sa132"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=63658103d4441924f8dbfc517b99bb54758a98b9"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Issue Tracking"
],
"url": "https://github.com/openssl/openssl/issues/1563"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://security.gentoo.org/glsa/201612-16"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "https://www.openssl.org/news/secadv/20160922.txt"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.tenable.com/security/tns-2016-16"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.tenable.com/security/tns-2016-20"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.tenable.com/security/tns-2016-21"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-20"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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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.
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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.
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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.
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