{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2011-12-07T00:00:00", "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."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2017-08-28T12:57:01", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"name": "MDVSA-2011:182", "tags": ["vendor-advisory", "x_refsource_MANDRIVA"], "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:182"}, {"name": "47153", "tags": ["third-party-advisory", "x_refsource_SECUNIA"], "url": "http://secunia.com/advisories/47153"}, {"name": "FEDORA-2011-16976", "tags": ["vendor-advisory", "x_refsource_FEDORA"], "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html"}, {"name": "USN-1309-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "http://www.ubuntu.com/usn/USN-1309-1"}, {"name": "openSUSE-SU-2011:1318", "tags": ["vendor-advisory", "x_refsource_SUSE"], "url": "http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html"}, {"name": "isc-dhcp-dhcpd-regex-dos(71680)", "tags": ["vdb-entry", "x_refsource_XF"], "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/71680"}, {"name": "47178", "tags": ["third-party-advisory", "x_refsource_SECUNIA"], "url": "http://secunia.com/advisories/47178"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://www.isc.org/software/dhcp/advisories/cve-2011-4539"}, {"name": "FEDORA-2011-16981", "tags": ["vendor-advisory", "x_refsource_FEDORA"], "url": "http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html"}, {"name": "DSA-2519", "tags": ["vendor-advisory", "x_refsource_DEBIAN"], "url": "http://www.debian.org/security/2012/dsa-2519"}, {"name": "1026393", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id?1026393"}, {"name": "GLSA-201301-06", "tags": ["vendor-advisory", "x_refsource_GENTOO"], "url": "http://security.gentoo.org/glsa/glsa-201301-06.xml"}, {"name": "50971", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/50971"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2011-4539", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "MDVSA-2011:182", "refsource": "MANDRIVA", "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:182"}, {"name": "47153", "refsource": "SECUNIA", "url": "http://secunia.com/advisories/47153"}, {"name": "FEDORA-2011-16976", "refsource": "FEDORA", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html"}, {"name": "USN-1309-1", "refsource": "UBUNTU", "url": "http://www.ubuntu.com/usn/USN-1309-1"}, {"name": "openSUSE-SU-2011:1318", "refsource": "SUSE", "url": "http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html"}, {"name": "isc-dhcp-dhcpd-regex-dos(71680)", "refsource": "XF", "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/71680"}, {"name": "47178", "refsource": "SECUNIA", "url": "http://secunia.com/advisories/47178"}, {"name": "https://www.isc.org/software/dhcp/advisories/cve-2011-4539", "refsource": "CONFIRM", "url": "https://www.isc.org/software/dhcp/advisories/cve-2011-4539"}, {"name": "FEDORA-2011-16981", "refsource": "FEDORA", "url": "http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html"}, {"name": "DSA-2519", "refsource": "DEBIAN", "url": "http://www.debian.org/security/2012/dsa-2519"}, {"name": "1026393", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id?1026393"}, {"name": "GLSA-201301-06", "refsource": "GENTOO", "url": "http://security.gentoo.org/glsa/glsa-201301-06.xml"}, {"name": "50971", "refsource": "BID", "url": "http://www.securityfocus.com/bid/50971"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-07T00:09:18.744Z"}, "title": "CVE Program Container", "references": [{"name": "MDVSA-2011:182", "tags": ["vendor-advisory", "x_refsource_MANDRIVA", "x_transferred"], "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:182"}, {"name": "47153", "tags": ["third-party-advisory", "x_refsource_SECUNIA", "x_transferred"], "url": "http://secunia.com/advisories/47153"}, {"name": "FEDORA-2011-16976", "tags": ["vendor-advisory", "x_refsource_FEDORA", "x_transferred"], "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html"}, {"name": "USN-1309-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "http://www.ubuntu.com/usn/USN-1309-1"}, {"name": "openSUSE-SU-2011:1318", "tags": ["vendor-advisory", "x_refsource_SUSE", "x_transferred"], "url": "http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html"}, {"name": "isc-dhcp-dhcpd-regex-dos(71680)", "tags": ["vdb-entry", "x_refsource_XF", "x_transferred"], "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/71680"}, {"name": "47178", "tags": ["third-party-advisory", "x_refsource_SECUNIA", "x_transferred"], "url": "http://secunia.com/advisories/47178"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.isc.org/software/dhcp/advisories/cve-2011-4539"}, {"name": "FEDORA-2011-16981", "tags": ["vendor-advisory", "x_refsource_FEDORA", "x_transferred"], "url": "http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html"}, {"name": "DSA-2519", "tags": ["vendor-advisory", "x_refsource_DEBIAN", "x_transferred"], "url": "http://www.debian.org/security/2012/dsa-2519"}, {"name": "1026393", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "url": "http://www.securitytracker.com/id?1026393"}, {"name": "GLSA-201301-06", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"], "url": "http://security.gentoo.org/glsa/glsa-201301-06.xml"}, {"name": "50971", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/50971"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2011-4539", "datePublished": "2011-12-08T11:00:00", "dateReserved": "2011-11-22T00:00:00", "dateUpdated": "2024-08-07T00:09:18.744Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:isc:dhcp:4.0:*:*:*:*:*:*:*", "matchCriteriaId": "685EB87F-756C-4DBA-A347-171470EA0B47", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "79DA60EA-F94F-4890-BF9E-E142BC219118", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.1:-:*:*:*:*:*:*", "matchCriteriaId": "22F98A8C-2C14-40F2-9CA6-FDB909CAB4EC", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.1:b1:*:*:*:*:*:*", "matchCriteriaId": "1F1D4AC8-EF46-4770-88D0-8625CA3B0494", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "FAD5E62F-2C6E-4E78-BDED-1E98F4B6AB99", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.2:-:*:*:*:*:*:*", "matchCriteriaId": "D90EE731-495C-41B3-B525-CB45392D0190", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.2:b1:*:*:*:*:*:*", "matchCriteriaId": "09AEAAB7-65FD-4126-A885-813A68B2C942", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.2:b2:*:*:*:*:*:*", "matchCriteriaId": "BB509C28-72ED-4363-B56A-92D4427FB4E5", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.2:b3:*:*:*:*:*:*", "matchCriteriaId": "53F71472-2EC8-441A-B27A-201BEE567717", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.2:rc1:*:*:*:*:*:*", "matchCriteriaId": "584F117E-BDF9-43C5-A870-52EC88855416", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.3:-:*:*:*:*:*:*", "matchCriteriaId": "757A6609-79A3-4E52-9CB0-AB830172A69B", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.3:b1:*:*:*:*:*:*", "matchCriteriaId": "3B3EFEAF-F562-488B-9EF4-1467CEF719AF", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.0.3:rc1:*:*:*:*:*:*", "matchCriteriaId": "F028BC86-1573-4B86-9976-5F0DA4DB6CC4", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1.1:b3:*:*:*:*:*:*", "matchCriteriaId": "E6CE1A0F-BE1E-4312-B68F-F09B05929F9C", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "17B6DEFA-0977-474A-9871-B03DEE924ADA", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1.2:*:*:*:*:*:*:*", "matchCriteriaId": "DE50853A-BAE7-499B-A3D7-468A08A07BD3", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:-:*:*:*:*:*:*", "matchCriteriaId": "150D46FA-873E-4E4F-8192-BCA1076994D7", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:a1:*:*:*:*:*:*", "matchCriteriaId": "56113AB6-8295-4EB7-A003-79049FBB8B4C", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:a2:*:*:*:*:*:*", "matchCriteriaId": "362DA97E-B940-4649-803F-26D8C1D16DA5", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:b1:*:*:*:*:*:*", "matchCriteriaId": "950A6BA0-C348-4B89-8C18-F2AFA467649F", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:b2:*:*:*:*:*:*", "matchCriteriaId": "9088D042-F104-4F31-AEBB-75F5A0F03AE5", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:p1:*:*:*:*:*:*", "matchCriteriaId": "F159908A-00E7-4EC8-8342-28182F547C4A", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "1C49DF07-9612-43C7-9771-B76487B4A9CD", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.1:-:*:*:*:*:*:*", "matchCriteriaId": "5C6D8D55-DCD2-4E70-B3C6-76F2134DA336", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.1:b1:*:*:*:*:*:*", "matchCriteriaId": "C0F06FC0-6477-4589-B9CB-24B1F893EF09", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "6CCA07EB-B0CB-40EE-B62E-DB4C408717B7", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.2:-:*:*:*:*:*:*", "matchCriteriaId": "5E91F700-F59A-491F-BA99-53EC79E573D6", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.2:b1:*:*:*:*:*:*", "matchCriteriaId": "53551545-041A-456F-BC81-E05A6B3CB198", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.2:rc1:*:*:*:*:*:*", "matchCriteriaId": "0F3DBB40-638E-4A4B-99B4-534D2564E146", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.2.3:-:*:*:*:*:*:*", "matchCriteriaId": "0B921430-F03C-42DB-A362-562136B01445", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:*", "matchCriteriaId": "F27D0660-2F07-430B-A651-5D0B6AA763C0", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*", "matchCriteriaId": "FBAABA4E-0D34-4644-AC26-E272CEE6C361", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:*", "matchCriteriaId": "A5E2FFC7-6E73-463E-846C-C403E41A2022", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:*", "matchCriteriaId": "E9D08285-745D-40AB-9A78-F467712CDA5A", "vulnerable": true}, {"criteria": "cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1:*:*:*:*:*:*", "matchCriteriaId": "1D115F1F-1A3A-4924-AF10-723B3BB0CBB9", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*", "matchCriteriaId": "EF49D26F-142E-468B-87C1-BABEA445255C", "vulnerable": true}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*", "matchCriteriaId": "E4174F4F-149E-41A6-BBCC-D01114C05F38", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*", "matchCriteriaId": "036E8A89-7A16-411F-9D31-676313BB7244", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "16F59A04-14CF-49E2-9973-645477EA09DA", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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 denegaci\u00f3n de servicio (ca\u00edda del deminio) a trav\u00e9s de un paquete de petici\u00f3n modificado."}], "id": "CVE-2011-4539", "lastModified": "2025-04-11T00:51:21.963", "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}]}, "published": "2011-12-08T11:55:02.407", "references": [{"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "http://secunia.com/advisories/47153"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "http://secunia.com/advisories/47178"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "http://security.gentoo.org/glsa/glsa-201301-06.xml"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "http://www.debian.org/security/2012/dsa-2519"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:182"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/50971"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id?1026393"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "http://www.ubuntu.com/usn/USN-1309-1"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/71680"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.isc.org/software/dhcp/advisories/cve-2011-4539"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://secunia.com/advisories/47153"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://secunia.com/advisories/47178"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://security.gentoo.org/glsa/glsa-201301-06.xml"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://www.debian.org/security/2012/dsa-2519"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://www.mandriva.com/security/advisories?name=MDVSA-2011:182"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/50971"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id?1026393"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://www.ubuntu.com/usn/USN-1309-1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/71680"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.isc.org/software/dhcp/advisories/cve-2011-4539"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2011:1819", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "dhcp-12:4.1.1-25.P1.el6_2.1", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2011-12-14T00:00:00Z"}], "bugzilla": {"description": "dhcp: DoS due to processing certain regular expressions", "id": "761265", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=761265"}, "csaw": false, "cvss": {"cvss_base_score": "4.3", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "status": "verified"}, "details": ["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."], "name": "CVE-2011-4539", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Not affected", "package_name": "dhcp", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "dhcp", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2011-12-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2011-4539\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-4539"], "statement": "This issue did not affect the versions of dhcp as shipped with Red Hat Enterprise Linux 4 and 5.", "threat_severity": "Moderate"}