CVE-2016-2851
Estado: ModificadaCrítica (9.8)—
Integer overflow in proto.c in libotr before 4.1.1 on 64-bit platforms allows remote attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code via a series of large OTR messages, which triggers a heap-based buffer overflow.
CVSS
- Versión: 3.0
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 25%
- Percentil entre todas las CVEs puntuadas: 98
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (4)
CWE
- CWE-119
Referencias
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html
- http://seclists.org/fulldisclosure/2016/Mar/21
- http://www.debian.org/security/2016/dsa-3512
- http://www.securityfocus.com/archive/1/537745/100/0/threaded
- http://www.securityfocus.com/bid/84285
- http://www.ubuntu.com/usn/USN-2926-1
- https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html
- https://security.gentoo.org/glsa/201701-10
- https://www.exploit-db.com/exploits/39550/
- https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html
- http://seclists.org/fulldisclosure/2016/Mar/21
- http://www.debian.org/security/2016/dsa-3512
- http://www.securityfocus.com/archive/1/537745/100/0/threaded
- http://www.securityfocus.com/bid/84285
- http://www.ubuntu.com/usn/USN-2926-1
- https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html
- https://security.gentoo.org/glsa/201701-10
- https://www.exploit-db.com/exploits/39550/
- https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/
JSON original (NVD)
Mostrar
{
"id": "CVE-2016-2851",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 7.5,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"authentication": "NONE",
"integrityImpact": "PARTIAL",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 6.4,
"baseSeverity": "HIGH",
"obtainAllPrivilege": false,
"exploitabilityScore": 10,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.0",
"baseScore": 9.8,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2016-04-07T23:59:09.940",
"references": [
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html",
"tags": [
"Mailing List"
],
"source": "cve@mitre.org"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html",
"tags": [
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://seclists.org/fulldisclosure/2016/Mar/21",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.debian.org/security/2016/dsa-3512",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.securityfocus.com/archive/1/537745/100/0/threaded",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.securityfocus.com/bid/84285",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.ubuntu.com/usn/USN-2926-1",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html",
"tags": [
"Exploit"
],
"source": "cve@mitre.org"
},
{
"url": "https://security.gentoo.org/glsa/201701-10",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://www.exploit-db.com/exploits/39550/",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "cve@mitre.org"
},
{
"url": "https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/",
"tags": [
"Exploit"
],
"source": "cve@mitre.org"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00021.html",
"tags": [
"Mailing List"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00030.html",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://seclists.org/fulldisclosure/2016/Mar/21",
"tags": [
"Exploit",
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.debian.org/security/2016/dsa-3512",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.securityfocus.com/archive/1/537745/100/0/threaded",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.securityfocus.com/bid/84285",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.ubuntu.com/usn/USN-2926-1",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.cypherpunks.ca/pipermail/otr-users/2016-March/002581.html",
"tags": [
"Exploit"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.gentoo.org/glsa/201701-10",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.exploit-db.com/exploits/39550/",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.x41-dsec.de/lab/advisories/x41-2016-001-libotr/",
"tags": [
"Exploit"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-119"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Integer overflow in proto.c in libotr before 4.1.1 on 64-bit platforms allows remote attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code via a series of large OTR messages, which triggers a heap-based buffer overflow."
},
{
"lang": "es",
"value": "Desbordamiento de entero en proto.c en libotr en versiones anteriores a 4.1.1 en plataformas de 64-bit permite a atacantes remotos causar denegación de servicio (corrupción de memoria y caída de aplicación) o ejecutar código arbitrario a través de una serie de mensajes OTR grandes, lo que desencadena un desbordamiento de buffer basado en memoria dinámica."
}
],
"lastModified": "2026-06-17T00:44:35.597",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA"
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4863BE36-D16A-4D75-90D9-FD76DB5B48B7"
},
{
"criteria": "cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "03117DF1-3BEC-4B8D-AD63-DBBDB2126081"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:cypherpunks:libotr:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "26B9C4D7-9262-46BF-A959-AB6961C1DE84",
"versionEndIncluding": "4.1.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}