ubuntu-cve-2021-24032
Vulnerability from osv_ubuntu
Published
2021-02-20 00:00
Modified
2026-04-22 07:39
Summary
Details

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.

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

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "libzstd1",
            "binary_version": "1.3.1+dfsg-1~ubuntu0.16.04.1+esm3"
          },
          {
            "binary_name": "zstd",
            "binary_version": "1.3.1+dfsg-1~ubuntu0.16.04.1+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "libzstd",
        "purl": "pkg:deb/ubuntu/libzstd@1.3.1+dfsg-1~ubuntu0.16.04.1+esm3?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.1+dfsg-1~ubuntu0.16.04.1+esm3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.4.5-1",
        "0.5.1-1",
        "1.3.1+dfsg-1~ubuntu0.16.04.1",
        "1.3.1+dfsg-1~ubuntu0.16.04.1+esm1",
        "1.3.1+dfsg-1~ubuntu0.16.04.1+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libzstd1",
            "binary_version": "1.3.3+dfsg-2ubuntu1.2"
          },
          {
            "binary_name": "zstd",
            "binary_version": "1.3.3+dfsg-2ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "libzstd",
        "purl": "pkg:deb/ubuntu/libzstd@1.3.3+dfsg-2ubuntu1.2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.3+dfsg-2ubuntu1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.1+dfsg-1",
        "1.3.2+dfsg-1",
        "1.3.2+dfsg2-1",
        "1.3.3+dfsg-1",
        "1.3.3+dfsg-1ubuntu1",
        "1.3.3+dfsg-2ubuntu1",
        "1.3.3+dfsg-2ubuntu1.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libzstd1",
            "binary_version": "1.4.4+dfsg-3ubuntu0.1"
          },
          {
            "binary_name": "zstd",
            "binary_version": "1.4.4+dfsg-3ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libzstd",
        "purl": "pkg:deb/ubuntu/libzstd@1.4.4+dfsg-3ubuntu0.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.4.4+dfsg-3ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.3+dfsg-1",
        "1.4.4+dfsg-1",
        "1.4.4+dfsg-3"
      ]
    }
  ],
  "aliases": [],
  "details": "Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.",
  "id": "UBUNTU-CVE-2021-24032",
  "modified": "2026-04-22T07:39:56Z",
  "published": "2021-02-20T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-24032"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4760-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5720-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-24032"
    }
  ],
  "related": [
    "USN-4760-1",
    "USN-5720-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-24032"
  ]
}



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