CVE-2019-3823
Estado: ModificadaAlta (7.5)—
libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads beyond the allocated buffer. The read contents will not be returned to the caller.
CVSS
- Versión: 3.0
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 4.29%
- Percentil entre todas las CVEs puntuadas: 91
- 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 (7)
CWE
- CWE-125
- CWE-125
Referencias
- http://www.securityfocus.com/bid/106950
- https://access.redhat.com/errata/RHSA-2019:3701
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823
- https://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf
- https://curl.haxx.se/docs/CVE-2019-3823.html
- https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
- https://security.gentoo.org/glsa/201903-03
- https://security.netapp.com/advisory/ntap-20190315-0001/
- https://usn.ubuntu.com/3882-1/
- https://www.debian.org/security/2019/dsa-4386
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- http://www.securityfocus.com/bid/106950
- https://access.redhat.com/errata/RHSA-2019:3701
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823
- https://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf
- https://curl.haxx.se/docs/CVE-2019-3823.html
- https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
- https://security.gentoo.org/glsa/201903-03
- https://security.netapp.com/advisory/ntap-20190315-0001/
- https://usn.ubuntu.com/3882-1/
- https://www.debian.org/security/2019/dsa-4386
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
JSON original (NVD)
Mostrar
{
"id": "CVE-2019-3823",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2019-3823",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-04-15T20:52:04.620309Z"
}
}
],
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 5,
"accessVector": "NETWORK",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"authentication": "NONE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "PARTIAL",
"confidentialityImpact": "NONE"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "MEDIUM",
"obtainAllPrivilege": false,
"exploitabilityScore": 10,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"type": "Secondary",
"source": "secalert@redhat.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.0",
"baseScore": 4.3,
"attackVector": "NETWORK",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "LOW"
},
"impactScore": 1.4,
"exploitabilityScore": 2.8
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.0",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "secalert@redhat.com",
"affectedData": [
{
"vendor": "The curl Project",
"product": "curl",
"versions": [
{
"status": "affected",
"version": "7.64.0"
}
]
}
]
}
],
"published": "2019-02-06T20:29:00.400",
"references": [
{
"url": "http://www.securityfocus.com/bid/106950",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "secalert@redhat.com"
},
{
"url": "https://access.redhat.com/errata/RHSA-2019:3701",
"source": "secalert@redhat.com"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823",
"tags": [
"Exploit",
"Issue Tracking",
"Patch",
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf",
"source": "secalert@redhat.com"
},
{
"url": "https://curl.haxx.se/docs/CVE-2019-3823.html",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E",
"source": "secalert@redhat.com"
},
{
"url": "https://security.gentoo.org/glsa/201903-03",
"tags": [
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://security.netapp.com/advisory/ntap-20190315-0001/",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://usn.ubuntu.com/3882-1/",
"tags": [
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://www.debian.org/security/2019/dsa-4386",
"tags": [
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "secalert@redhat.com"
},
{
"url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html",
"source": "secalert@redhat.com"
},
{
"url": "http://www.securityfocus.com/bid/106950",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://access.redhat.com/errata/RHSA-2019:3701",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3823",
"tags": [
"Exploit",
"Issue Tracking",
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-936080.pdf",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://curl.haxx.se/docs/CVE-2019-3823.html",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E",
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.gentoo.org/glsa/201903-03",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://security.netapp.com/advisory/ntap-20190315-0001/",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://usn.ubuntu.com/3882-1/",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.debian.org/security/2019/dsa-4386",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html",
"tags": [
"Patch",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html",
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "secalert@redhat.com",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
},
{
"type": "Secondary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "libcurl versions from 7.34.0 to before 7.64.0 are vulnerable to a heap out-of-bounds read in the code handling the end-of-response for SMTP. If the buffer passed to `smtp_endofresp()` isn't NUL terminated and contains no character ending the parsed number, and `len` is set to 5, then the `strtol()` call reads beyond the allocated buffer. The read contents will not be returned to the caller."
},
{
"lang": "es",
"value": "libcurl, desde la versión 7.34.0 hasta antes de la 7.64.0, es vulnerable a una lectura de memoria dinámica (heap) fuera de límites en el código que maneja el final de la respuesta para SMTP. Si el búfer que se pasa a \"smtp_endofresp()\" no termina en NUL, no contiene caracteres que terminen el número analizado y \"len\" se establece como 5, la llamada \"strtol()\" lee más allá del búfer asignado. Los contenidos de la lectura no se devolverán al llamante."
}
],
"lastModified": "2026-06-17T02:35:39.797",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "AA479CAB-06B4-450E-B78A-60A623E62863",
"versionEndExcluding": "7.64.0",
"versionStartIncluding": "7.34.0"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B5A6F2F3-4894-4392-8296-3B8DD2679084"
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F7016A2A-8365-4F1A-89A2-7A19F2BCAE5B"
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"vulnerable": true,
"matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D"
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "07C312A0-CD2C-4B9C-B064-6409B25C278F"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netapp:clustered_data_ontap:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B0E976A9-6253-4DF5-9370-471D0469B395"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:oracle:communications_operations_monitor:3.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D52F557F-D0A0-43D3-85F1-F10B6EBFAEDF"
},
{
"criteria": "cpe:2.3:a:oracle:communications_operations_monitor:4.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E3517A27-E6EE-497C-9996-F78171BBE90F"
},
{
"criteria": "cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DFC79B17-E9D2-44D5-93ED-2F959E7A3D43"
},
{
"criteria": "cpe:2.3:a:oracle:secure_global_desktop:5.4:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B5265C91-FF5C-4451-A7C2-D388A65ACFA2"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "secalert@redhat.com"
}