Security advisory

{
  "id": "9412f28c23d9825a78b23a954f052f0fe1ff1a3752c6d8ff7c3ef6b52a5136f5",
  "url": "https://osv.dev/vulnerability/CVE-2021-42377",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-42377",
    "summary": "An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.",
    "evidence": "osv:CVE-2021-42377",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-42377",
      "aliases": [
        "CVE-2021-42377"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mirror/busybox",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a4c3a341394a1fb25be8c15d2ddfe3ec77cbb83c"
                },
                {
                  "last_affected": "bcc5b0e6caca6c7602a6a41faa5f980292e0fbc5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:busybox:busybox:1.33.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.33.0"
                      },
                      {
                        "last_affected": "1.33.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:busybox:busybox:1.33.1:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.33.1"
                      },
                      {
                        "last_affected": "1.33.1"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.33.0",
            "1.33.1",
            "1_33_1",
            "1_33_0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-42377.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:15.963514233Z",
      "provider": "osv",
      "references": [
        "https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/",
        "https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/",
        "https://security.netapp.com/advisory/ntap-20211223-0002/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "33"
                  },
                  {
                    "last_affected": "33"
                  },
                  {
                    "introduced": "34"
                  },
                  {
                    "last_affected": "34"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-42377",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429250,
  "published_at": "2021-11-15T21:15:07.7+00:00"
}