CVE-2018-5732 (GCVE-0-2018-5732)

Vulnerability from cvelistv5 – Published: 2019-10-09 14:17 – Updated: 2024-09-16 18:19
VLAI?
Summary
Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
Severity ?
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • Affected versions of dhclient should crash due to an out-of-bounds memory access if they receive and process a triggering response packet. However, buffer overflow outcomes can vary by operating system, and outcomes such as remote code execution may be possible in some circumstances. Where they are present, operating system mitigation strategies such as address space layout randomization (ASLR) should make it difficult to leverage this vulnerability to achieve remote code execution, but we cannot rule it out as impossible. The safest course is to patch dhclient so that the buffer overflow cannot occur.
Assigner
isc
References
https://kb.isc.org/docs/aa-01565 x_refsource_CONFIRM
Impacted products
Vendor Product Version
ISC ISC DHCP Affected: ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
Create a notification for this product.
Credits
ISC would like to thank Felix Wilhelm, Google Security Team, for reporting this vulnerability.
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Affects ISC DHCP versions 4.1.0 -\u003e 4.1-ESV-R15, 4.2.0 -\u003e 4.2.8, 4.3.0 -\u003e 4.3.6, 4.4.0\"},{\"lang\":\"es\",\"value\":\"Un fallo al comprobar apropiadamente los l\u00edmites de un b\u00fafer usado para procesar las opciones de DHCP, permite a un servidor malicioso (o a una entidad que se hace pasar por un servidor) causar un desbordamiento del b\u00fafer (y el bloqueo resultante) en dhclient mediante el env\u00edo de una respuesta que contiene una secci\u00f3n de opciones especialmente construida. Afecta a ISC DHCP versiones 4.1.0 hasta 4.1-ESV-R15, 4.2.0 hasta 4.2.8, 4.3.0 hasta 4.3.6, y 4.4.0.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV30\":[{\"source\":\"security-officer@isc.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:N/I:N/A:P\",\"baseScore\":5.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":10.0,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-119\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.1.0\",\"versionEndIncluding\":\"4.1.2\",\"matchCriteriaId\":\"0A611E97-A264-4B4C-93CE-7FC01FE5F708\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.2.0\",\"versionEndExcluding\":\"4.2.8\",\"matchCriteriaId\":\"257C8915-697E-4274-8BCB-43B690FA5C96\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.3.0\",\"versionEndExcluding\":\"4.3.6\",\"matchCriteriaId\":\"341617C4-C370-44AD-9138-14EBB3A758F1\"},{\"vulnerable\":true,\"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:r10:*:*:*:*:*:*\",\"matchCriteriaId\":\"179443DC-4B6A-408A-8BE5-B3E72188F43E\"},{\"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: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: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: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: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: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:r3b1:*:*:*:*:*:*\",\"matchCriteriaId\":\"C19C3B91-215D-4697-84D9-13CC18445C82\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r4:*:*:*:*:*:*\",\"matchCriteriaId\":\"79F235F0-AD16-4E5B-AB60-97F0BB86AEB6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r5:*:*:*:*:*:*\",\"matchCriteriaId\":\"E84D5E5B-0336-4166-AAAC-49375E3AF971\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r5b1:*:*:*:*:*:*\",\"matchCriteriaId\":\"4EF0CF57-C49C-4801-B4E1-7D82C3F6E3A2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r5rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8290ECB4-3B70-4126-BF10-68A5A863E297\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r5rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"6D35C997-593E-4994-9501-2010D98459D8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r6:*:*:*:*:*:*\",\"matchCriteriaId\":\"65E0296F-3522-4B43-AF34-CFE1AE7EEC1E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r7:*:*:*:*:*:*\",\"matchCriteriaId\":\"69F6E619-A52B-4A60-8247-41ADD0E7D655\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r8:*:*:*:*:*:*\",\"matchCriteriaId\":\"AA48EBAA-10B7-43D6-9A27-99F2578DF7F6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r8b1:*:*:*:*:*:*\",\"matchCriteriaId\":\"9421E40A-FF8D-426B-99A0-24DCD8D9B39D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r8rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"81BB427C-AE69-4BFB-B956-F62373FA1EFC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r9:*:*:*:*:*:*\",\"matchCriteriaId\":\"7DABD43E-818A-4B21-B4E7-753056D4A184\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r9b1:*:*:*:*:*:*\",\"matchCriteriaId\":\"7A08F801-2A32-492F-BAB4-8E32E9981CAC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1-esv:r9rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B2FDBA4F-CDE8-4767-8C41-328FF9ACB2EB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.1.2:p1:*:*:*:*:*:*\",\"matchCriteriaId\":\"CA5D825C-B72A-44F5-AF24-4F3200881ABA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:isc:dhcp:4.4.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"13C8AD22-6E39-4899-88B2-7ED44BE890A6\"}]}]}],\"references\":[{\"url\":\"https://kb.isc.org/docs/aa-01565\",\"source\":\"security-officer@isc.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://kb.isc.org/docs/aa-01565\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}"
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.