CVE-2018-5732
Vulnerability from cvelistv5
Published
2019-10-09 14:17
Modified
2024-09-16 18:19
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
Impacted products
Vendor Product Version
ISC ISC DHCP Version: 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.
Show details on NVD website


{
   containers: {
      adp: [
         {
            providerMetadata: {
               dateUpdated: "2024-08-05T05:40:51.169Z",
               orgId: "af854a3a-2127-422b-91ae-364da2661108",
               shortName: "CVE",
            },
            references: [
               {
                  tags: [
                     "x_refsource_CONFIRM",
                     "x_transferred",
                  ],
                  url: "https://kb.isc.org/docs/aa-01565",
               },
            ],
            title: "CVE Program Container",
         },
      ],
      cna: {
         affected: [
            {
               product: "ISC DHCP",
               vendor: "ISC",
               versions: [
                  {
                     status: "affected",
                     version: "ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0",
                  },
               ],
            },
         ],
         credits: [
            {
               lang: "en",
               value: "ISC would like to thank Felix Wilhelm, Google Security Team, for reporting this vulnerability.",
            },
         ],
         datePublic: "2018-02-28T00:00:00",
         descriptions: [
            {
               lang: "en",
               value: "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",
            },
         ],
         metrics: [
            {
               cvssV3_0: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 7.5,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.0",
               },
            },
         ],
         problemTypes: [
            {
               descriptions: [
                  {
                     description: "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.",
                     lang: "en",
                     type: "text",
                  },
               ],
            },
         ],
         providerMetadata: {
            dateUpdated: "2019-10-09T14:17:14",
            orgId: "404fd4d2-a609-4245-b543-2c944a302a22",
            shortName: "isc",
         },
         references: [
            {
               tags: [
                  "x_refsource_CONFIRM",
               ],
               url: "https://kb.isc.org/docs/aa-01565",
            },
         ],
         solutions: [
            {
               lang: "en",
               value: "Upgrade to the patched release most closely related to your current version of DHCP. ISC DHCP releases are available from https://www.isc.org/downloads.\n\n >=   DHCP 4.1-ESV-R15-P1\n >=   DHCP 4.3.6-P1\n >=   DHCP 4.4.1",
            },
         ],
         source: {
            discovery: "EXTERNAL",
         },
         title: "A specially constructed response from a malicious server can cause a buffer overflow in dhclient",
         x_legacyV4Record: {
            CVE_data_meta: {
               ASSIGNER: "security-officer@isc.org",
               DATE_PUBLIC: "2018-02-28T00:00:00.000Z",
               ID: "CVE-2018-5732",
               STATE: "PUBLIC",
               TITLE: "A specially constructed response from a malicious server can cause a buffer overflow in dhclient",
            },
            affects: {
               vendor: {
                  vendor_data: [
                     {
                        product: {
                           product_data: [
                              {
                                 product_name: "ISC DHCP",
                                 version: {
                                    version_data: [
                                       {
                                          version_name: "ISC DHCP",
                                          version_value: "4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0",
                                       },
                                    ],
                                 },
                              },
                           ],
                        },
                        vendor_name: "ISC",
                     },
                  ],
               },
            },
            credit: [
               {
                  lang: "eng",
                  value: "ISC would like to thank Felix Wilhelm, Google Security Team, for reporting this vulnerability.",
               },
            ],
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "eng",
                     value: "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",
                  },
               ],
            },
            impact: {
               cvss: {
                  attackComplexity: "LOW",
                  attackVector: "NETWORK",
                  availabilityImpact: "HIGH",
                  baseScore: 7.5,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "NONE",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  version: "3.0",
               },
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "eng",
                           value: "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.",
                        },
                     ],
                  },
               ],
            },
            references: {
               reference_data: [
                  {
                     name: "https://kb.isc.org/docs/aa-01565",
                     refsource: "CONFIRM",
                     url: "https://kb.isc.org/docs/aa-01565",
                  },
               ],
            },
            solution: [
               {
                  lang: "en",
                  value: "Upgrade to the patched release most closely related to your current version of DHCP. ISC DHCP releases are available from https://www.isc.org/downloads.\n\n >=   DHCP 4.1-ESV-R15-P1\n >=   DHCP 4.3.6-P1\n >=   DHCP 4.4.1",
               },
            ],
            source: {
               discovery: "EXTERNAL",
            },
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "404fd4d2-a609-4245-b543-2c944a302a22",
      assignerShortName: "isc",
      cveId: "CVE-2018-5732",
      datePublished: "2019-10-09T14:17:14.251822Z",
      dateReserved: "2018-01-17T00:00:00",
      dateUpdated: "2024-09-16T18:19:36.136Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2018-5732\",\"sourceIdentifier\":\"security-officer@isc.org\",\"published\":\"2019-10-09T16:15:13.407\",\"lastModified\":\"2024-11-21T04:09:16.440\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\"},{\"lang\":\"es\",\"value\":\"Un fallo al comprobar apropiadamente los límites de un búfer 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 búfer (y el bloqueo resultante) en dhclient mediante el envío de una respuesta que contiene una sección 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\"]}]}}",
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.