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Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort."},{"lang":"es","value":"En ISC DHCP versiones 4.4.0 anteriores a 4.4.3, ISC DHCP versiones 4.1-ESV-R1 anteriores a 4.1-ESV-R16-P1, cuando la función option_code_hash_lookup() es llamada desde add_option(), incrementa el campo refcount de la opción. Sin embargo, no se presenta una llamada correspondiente a option_dereference() para disminuir el campo refcount. La función add_option() sólo es usada en las respuestas del servidor a paquetes de consulta de arrendamiento. Cada respuesta de consulta de arrendamiento llama a esta función para varias opciones, por lo que eventualmente, los contadores de referencia podrían desbordarse y causar a el servidor abortar"}],"metrics":{"cvssMetricV31":[{"source":"security-officer@isc.org","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":3.6},{"source":"nvd@nist.gov","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":6.5,"baseSeverity":"MEDIUM","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-476"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4.0","versionEndIncluding":"4.4.3","matchCriteriaId":"82DF9AAC-429A-43EB-83EF-0FEFBB95BF26"},{"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:r10:*:*:*:*:*:*","matchCriteriaId":"179443DC-4B6A-408A-8BE5-B3E72188F43E"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r10_b1:*:*:*:*:*:*","matchCriteriaId":"C9BE7736-58CD-468B-84AB-B38C9B254BA6"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r10_rc1:*:*:*:*:*:*","matchCriteriaId":"7EB6F7F0-B2A0-47E3-AD7A-4E7618A36F90"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r10b1:*:*:*:*:*:*","matchCriteriaId":"CA5FAE54-1645-4A38-A431-10E67304399A"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r10rc1:*:*:*:*:*:*","matchCriteriaId":"2C0D1A71-CECB-4C86-87F6-EB3741BDF692"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r11:*:*:*:*:*:*","matchCriteriaId":"ADF80D19-3B0A-4A74-944E-F33CCC30EADA"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r11_b1:*:*:*:*:*:*","matchCriteriaId":"40B21FCB-43A8-4266-934D-ECFF8138F637"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc1:*:*:*:*:*:*","matchCriteriaId":"69D49F23-9074-49E7-985F-4D93393324CD"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r11_rc2:*:*:*:*:*:*","matchCriteriaId":"3F729D1D-7234-4BC2-839B-AE1BB9D16C25"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r11b1:*:*:*:*:*:*","matchCriteriaId":"9E01D88D-876D-45FE-B7ED-089DAD801EF6"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r11rc1:*:*:*:*:*:*","matchCriteriaId":"C4B030B1-F008-4562-93C7-7E1C6D3D00F4"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r11rc2:*:*:*:*:*:*","matchCriteriaId":"FF656F5E-B317-4E0C-BF01-EC2A917142DC"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r12:*:*:*:*:*:*","matchCriteriaId":"FBA64EEC-C0C7-4F11-8131-2868691E54DB"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r12-p1:*:*:*:*:*:*","matchCriteriaId":"FFD3109A-1D76-4EA7-BF39-0B203AD945CF"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r12_b1:*:*:*:*:*:*","matchCriteriaId":"157520D7-AE39-4E23-A8CF-DD75EA78C055"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r12_p1:*:*:*:*:*:*","matchCriteriaId":"B07118EC-9508-42B8-8D09-5CE310DA2B43"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r12b1:*:*:*:*:*:*","matchCriteriaId":"2156D1BC-90AE-4AF3-964C-DAC7DCE14A5D"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r13:*:*:*:*:*:*","matchCriteriaId":"A157E664-6ACE-44CE-AC07-64898B182EA1"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r13_b1:*:*:*:*:*:*","matchCriteriaId":"0056BF7A-4A70-4F1D-89C2-25CCDB65217B"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r13b1:*:*:*:*:*:*","matchCriteriaId":"BA8ADA07-94FA-4014-AF70-8FCAF5F0DB03"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r14:*:*:*:*:*:*","matchCriteriaId":"1D21F05D-246F-41F5-81FD-286C26168E2E"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r14_b1:*:*:*:*:*:*","matchCriteriaId":"12103C87-C942-481A-A68C-7BC83F964C06"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r14b1:*:*:*:*:*:*","matchCriteriaId":"A2E0124D-6330-4013-8145-4309FDAE60A8"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r15:*:*:*:*:*:*","matchCriteriaId":"924E91FF-495F-4963-827F-57F7340C6560"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r15-p1:*:*:*:*:*:*","matchCriteriaId":"3BC02748-557A-4131-A372-D99B62B4B93B"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r15_b1:*:*:*:*:*:*","matchCriteriaId":"76A11284-3D81-45F0-8055-17282945C14F"},{"vulnerable":true,"criteria":"cpe:2.3:a:isc:dhcp:4.1-esv:r16: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