ubuntu-cve-2026-42484
Vulnerability from osv_ubuntu
Published
2026-05-01 14:16
Modified
2026-05-20 15:27
Summary
Details

A heap-based buffer overflow in hex_to_binary in the PKZIP hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted PKZIP hash file. The issue affects modules 17200, 17210, 17220, 17225, and 17230. When data_type_enum<=1, attacker-controlled hex data from a user-supplied hash string is decoded into a fixed-size buffer without proper input-length validation.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "4.0.1-1"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "4.0.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@4.0.1-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.60-1",
        "4.0.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "5.1.0+ds1-2"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "5.1.0+ds1-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@5.1.0+ds1-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.1.0+ds1-1",
        "5.1.0+ds1-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "6.2.5+ds1-2"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "6.2.5+ds1-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@6.2.5+ds1-2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1.1+ds1-1",
        "6.2.5+ds1-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "6.2.6+ds1-1build2"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "6.2.6+ds1-1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@6.2.6+ds1-1build2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.2.6+ds1-1",
        "6.2.6+ds1-1build1",
        "6.2.6+ds1-1build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "6.2.6+ds2-1"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "6.2.6+ds2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@6.2.6+ds2-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.2.6+ds2-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "hashcat",
            "binary_version": "7.1.2+ds1-3"
          },
          {
            "binary_name": "hashcat-data",
            "binary_version": "7.1.2+ds1-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "hashcat",
        "purl": "pkg:deb/ubuntu/hashcat@7.1.2+ds1-3?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.2.6+ds2-1",
        "7.1.2+ds1-3"
      ]
    }
  ],
  "aliases": [],
  "details": "A heap-based buffer overflow in hex_to_binary in the PKZIP hash parser in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted PKZIP hash file. The issue affects modules 17200, 17210, 17220, 17225, and 17230. When data_type_enum\u003c=1, attacker-controlled hex data from a user-supplied hash string is decoded into a fixed-size buffer without proper input-length validation.",
  "id": "UBUNTU-CVE-2026-42484",
  "modified": "2026-05-20T15:27:27Z",
  "published": "2026-05-01T14:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-42484"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-42484"
    },
    {
      "type": "REPORT",
      "url": "https://gist.github.com/sgInnora/107f2eb20367e47d58c911e38d56a91f"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-42484"
  ]
}



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