CVE-2011-4539
Estado: ModificadaMedia (5)—
dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet.
CVSS
- Versión: 2.0
- Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
- Puntuación base: 5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 15%
- Percentil entre todas las CVEs puntuadas: 97
- Fecha de la puntuación: 5/10/2026
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 (3)
CWE
- CWE-20
Referencias
- http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html
- http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html
- http://secunia.com/advisories/47153
- http://secunia.com/advisories/47178
- http://security.gentoo.org/glsa/glsa-201301-06.xml
- http://www.debian.org/security/2012/dsa-2519
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:182
- http://www.securityfocus.com/bid/50971
- http://www.securitytracker.com/id?1026393
- http://www.ubuntu.com/usn/USN-1309-1
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71680
- https://www.isc.org/software/dhcp/advisories/cve-2011-4539
- http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html
- http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html
- http://secunia.com/advisories/47153
- http://secunia.com/advisories/47178
- http://security.gentoo.org/glsa/glsa-201301-06.xml
- http://www.debian.org/security/2012/dsa-2519
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:182
- http://www.securityfocus.com/bid/50971
- http://www.securitytracker.com/id?1026393
- http://www.ubuntu.com/usn/USN-1309-1
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71680
- https://www.isc.org/software/dhcp/advisories/cve-2011-4539
JSON original (NVD)
Mostrar
{
"id": "CVE-2011-4539",
"cveTags": [],
"metrics": {
"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
}
]
},
"affected": [
{
"source": "cve@mitre.org",
"affectedData": [
{
"vendor": "n/a",
"product": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
]
}
],
"published": "2011-12-08T11:55:02.407",
"references": [
{
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://secunia.com/advisories/47153",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://secunia.com/advisories/47178",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://security.gentoo.org/glsa/glsa-201301-06.xml",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.debian.org/security/2012/dsa-2519",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:182",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.securityfocus.com/bid/50971",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.securitytracker.com/id?1026393",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "cve@mitre.org"
},
{
"url": "http://www.ubuntu.com/usn/USN-1309-1",
"tags": [
"Third Party Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/71680",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "cve@mitre.org"
},
{
"url": "https://www.isc.org/software/dhcp/advisories/cve-2011-4539",
"tags": [
"Vendor Advisory"
],
"source": "cve@mitre.org"
},
{
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://secunia.com/advisories/47153",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://secunia.com/advisories/47178",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://security.gentoo.org/glsa/glsa-201301-06.xml",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.debian.org/security/2012/dsa-2519",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:182",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.securityfocus.com/bid/50971",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.securitytracker.com/id?1026393",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "http://www.ubuntu.com/usn/USN-1309-1",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/71680",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://www.isc.org/software/dhcp/advisories/cve-2011-4539",
"tags": [
"Vendor Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-20"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet."
},
{
"lang": "es",
"value": "dhcpd en ISC DHCP v4.x antes de v4.2.3-P1 y v4.1-ESV antes de v4.1-ESV-R4 no manipula correctamente expresiones regulares en dhcpd.conf, lo que permite a atacantes remotos provocar una denegación de servicio (caída del deminio) a través de un paquete de petición modificado."
}
],
"lastModified": "2026-06-16T23:35:00.860",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "685EB87F-756C-4DBA-A347-171470EA0B47"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "79DA60EA-F94F-4890-BF9E-E142BC219118"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.1:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "22F98A8C-2C14-40F2-9CA6-FDB909CAB4EC"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.1:b1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1F1D4AC8-EF46-4770-88D0-8625CA3B0494"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.1:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FAD5E62F-2C6E-4E78-BDED-1E98F4B6AB99"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.2:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D90EE731-495C-41B3-B525-CB45392D0190"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.2:b1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "09AEAAB7-65FD-4126-A885-813A68B2C942"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.2:b2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BB509C28-72ED-4363-B56A-92D4427FB4E5"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.2:b3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "53F71472-2EC8-441A-B27A-201BEE567717"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.2:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "584F117E-BDF9-43C5-A870-52EC88855416"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.3:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "757A6609-79A3-4E52-9CB0-AB830172A69B"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.3:b1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3B3EFEAF-F562-488B-9EF4-1467CEF719AF"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.0.3:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F028BC86-1573-4B86-9976-5F0DA4DB6CC4"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.1.1:b3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E6CE1A0F-BE1E-4312-B68F-F09B05929F9C"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.1.1:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "17B6DEFA-0977-474A-9871-B03DEE924ADA"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.1.2:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DE50853A-BAE7-499B-A3D7-468A08A07BD3"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "150D46FA-873E-4E4F-8192-BCA1076994D7"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:a1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "56113AB6-8295-4EB7-A003-79049FBB8B4C"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:a2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "362DA97E-B940-4649-803F-26D8C1D16DA5"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:b1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "950A6BA0-C348-4B89-8C18-F2AFA467649F"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:b2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "9088D042-F104-4F31-AEBB-75F5A0F03AE5"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:p1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F159908A-00E7-4EC8-8342-28182F547C4A"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1C49DF07-9612-43C7-9771-B76487B4A9CD"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.1:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5C6D8D55-DCD2-4E70-B3C6-76F2134DA336"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.1:b1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C0F06FC0-6477-4589-B9CB-24B1F893EF09"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.1:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6CCA07EB-B0CB-40EE-B62E-DB4C408717B7"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.2:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5E91F700-F59A-491F-BA99-53EC79E573D6"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.2:b1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "53551545-041A-456F-BC81-E05A6B3CB198"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.2:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0F3DBB40-638E-4A4B-99B4-534D2564E146"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.2.3:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0B921430-F03C-42DB-A362-562136B01445"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F27D0660-2F07-430B-A651-5D0B6AA763C0"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FBAABA4E-0D34-4644-AC26-E272CEE6C361"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A5E2FFC7-6E73-463E-846C-C403E41A2022"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E9D08285-745D-40AB-9A78-F467712CDA5A"
},
{
"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1D115F1F-1A3A-4924-AF10-723B3BB0CBB9"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EF49D26F-142E-468B-87C1-BABEA445255C"
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E4174F4F-149E-41A6-BBCC-D01114C05F38"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "036E8A89-7A16-411F-9D31-676313BB7244"
},
{
"criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "cve@mitre.org"
}