vuln-ubuntu/data/osv/cve/2021/UBUNTU-CVE-2021-33455.json

{
  "schema_version": "1.7.0",
  "id": "UBUNTU-CVE-2021-33455",
  "details": "An issue was discovered in yasm version 1.3.0. There is a NULL pointer dereference in do_directive() in modules/preprocs/nasm/nasm-pp.c.",
  "aliases": [],
  "upstream": [
    "CVE-2021-33455"
  ],
  "related": [],
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
    },
    {
      "type": "Ubuntu",
      "score": "medium"
    }
  ],
  "published": "2022-07-26T13:15:00Z",
  "modified": "2026-10-17T09:08:26Z",
  "affected": [
    {
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "yasm",
        "purl": "pkg:deb/ubuntu/yasm@1.3.0-2?arch=source&distro=xenial"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.3.0-2"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "yasm",
            "binary_version": "1.3.0-2"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "yasm",
        "purl": "pkg:deb/ubuntu/yasm@1.3.0-2build1?arch=source&distro=bionic"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.3.0-2",
        "1.3.0-2build1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "yasm",
            "binary_version": "1.3.0-2build1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "yasm",
        "purl": "pkg:deb/ubuntu/yasm@1.3.0-2ubuntu1?arch=source&distro=focal"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.3.0-2build1",
        "1.3.0-2ubuntu1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "yasm",
            "binary_version": "1.3.0-2ubuntu1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "yasm",
        "purl": "pkg:deb/ubuntu/yasm@1.3.0-2.1?arch=source&distro=jammy"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.3.0-2.1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "yasm",
            "binary_version": "1.3.0-2.1"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "yasm",
        "purl": "pkg:deb/ubuntu/yasm@1.3.0-4?arch=source&distro=noble"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.3.0-4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "yasm",
            "binary_version": "1.3.0-4"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "yasm",
        "purl": "pkg:deb/ubuntu/yasm@1.3.0-7?arch=source&distro=questing"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.3.0-5",
        "1.3.0-7"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "yasm",
            "binary_version": "1.3.0-7"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "yasm",
        "purl": "pkg:deb/ubuntu/yasm@1.3.0-8?arch=source&distro=stonking"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.3.0-8"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "yasm",
            "binary_version": "1.3.0-8"
          }
        ]
      }
    },
    {
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "yasm",
        "purl": "pkg:deb/ubuntu/yasm@1.3.0-8?arch=source&distro=resolute"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            }
          ]
        }
      ],
      "versions": [
        "1.3.0-7",
        "1.3.0-8"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "yasm",
            "binary_version": "1.3.0-8"
          }
        ]
      }
    }
  ],
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-33455"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/yasm/yasm/issues/169"
    },
    {
      "type": "REPORT",
      "url": "https://gist.github.com/Clingto/bb632c0c463f4b2c97e4f65f751c5e6d"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-33455"
    }
  ]
}