Security advisory

{
  "id": "a15db3fd4b0ded5b38def527705a66350370844c70120badd01f6285ba7e7c70",
  "url": "https://osv.dev/vulnerability/CVE-2018-20679",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-20679",
    "summary": "An issue was discovered in BusyBox before 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP server, client, and relay) allows a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to verification in udhcp_get_option() in networking/udhcp/common.c that 4-byte options are indeed 4 bytes.",
    "evidence": "osv:CVE-2018-20679",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-20679",
      "aliases": [
        "CVE-2018-20679"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mirror/busybox",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "ef800e5441185585986f9b7aaf39010a926fbd5f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:busybox:busybox:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.30.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1_29_0",
            "1_28_0",
            "1_27_0",
            "1_26_0",
            "1_25_0",
            "1_24_0",
            "1_23_0",
            "1_22_0",
            "1_21_0",
            "1_20_0",
            "1_19_0",
            "1_18_0",
            "1_17_0",
            "1_16_0",
            "1_15_0",
            "1_14_0",
            "1_12_0",
            "1_10_0",
            "1_9_0",
            "1_8_0",
            "1_4_0",
            "1_2_0",
            "1_1_1",
            "1_1_0",
            "1_00",
            "1_00_rc3",
            "1_00_rc2",
            "1_00_rc1",
            "1_00_pre10",
            "1_00_pre9",
            "1_00_pre8",
            "1_00_pre7",
            "1_00_pre6",
            "1_00_pre5",
            "1_00_pre4",
            "1_00_pre3",
            "1_00_pre2",
            "1_00_pre1",
            "0_60_5",
            "0_60_4",
            "0_60_3",
            "0_60_2",
            "0_60_1",
            "0_60_0",
            "0_52",
            "0_51",
            "0_50",
            "0_49",
            "0_48",
            "0_47",
            "0_46",
            "0_45",
            "0_43",
            "0_43pre1",
            "0_42",
            "0_41",
            "0_40",
            "0_39",
            "0_36",
            "0_34",
            "0_33",
            "0_32",
            "0_29alpha2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20679.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:56.814217150Z",
      "provider": "osv",
      "references": [
        "https://seclists.org/bugtraq/2019/Sep/7",
        "https://busybox.net/news.html",
        "https://usn.ubuntu.com/3935-1/",
        "https://bugs.busybox.net/show_bug.cgi?id=11506",
        "https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562c"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "14.04"
                  },
                  {
                    "last_affected": "14.04"
                  },
                  {
                    "introduced": "16.04"
                  },
                  {
                    "last_affected": "16.04"
                  },
                  {
                    "introduced": "18.04"
                  },
                  {
                    "last_affected": "18.04"
                  },
                  {
                    "introduced": "18.10"
                  },
                  {
                    "last_affected": "18.10"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-20679",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 438729,
  "published_at": "2019-01-09T16:29:00.273+00:00"
}