ubuntu-cve-2021-28831
Vulnerability from osv_ubuntu
Published
2021-03-19 05:15
Modified
2025-09-08 16:47
Summary
Details

decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
low
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.21.0-1ubuntu1.4+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.21.0-1ubuntu1.4+esm1?arch=source\u0026distro=trusty/esm"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.21.0-1ubuntu1.4+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.20.0-8.1ubuntu1",
        "1:1.20.0-9ubuntu1",
        "1:1.20.0-9ubuntu2",
        "1:1.21.0-1ubuntu1",
        "1:1.21.0-1ubuntu1.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm1"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm1"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm1"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm1"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm1"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.22.0-15ubuntu1.4+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.22.0-15ubuntu1.4+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.22.0-15ubuntu1.4+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.22.0-15ubuntu1",
        "1:1.22.0-15ubuntu1.4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.27.2-2ubuntu3.4"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.27.2-2ubuntu3.4"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.27.2-2ubuntu3.4"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.27.2-2ubuntu3.4"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.27.2-2ubuntu3.4"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.27.2-2ubuntu3.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.27.2-2ubuntu3.4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.27.2-2ubuntu3.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.22.0-19ubuntu2",
        "1:1.27.2-1ubuntu3",
        "1:1.27.2-1ubuntu4",
        "1:1.27.2-2ubuntu2",
        "1:1.27.2-2ubuntu3",
        "1:1.27.2-2ubuntu3.1",
        "1:1.27.2-2ubuntu3.2",
        "1:1.27.2-2ubuntu3.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.30.1-4ubuntu6.4"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.30.1-4ubuntu6.4"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.30.1-4ubuntu6.4"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.30.1-4ubuntu6.4"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.30.1-4ubuntu6.4"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.30.1-4ubuntu6.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.30.1-4ubuntu6.4?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.30.1-4ubuntu6.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.30.1-4ubuntu4",
        "1:1.30.1-4ubuntu5",
        "1:1.30.1-4ubuntu6",
        "1:1.30.1-4ubuntu6.1",
        "1:1.30.1-4ubuntu6.2",
        "1:1.30.1-4ubuntu6.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "busybox",
            "binary_version": "1:1.30.1-7ubuntu2"
          },
          {
            "binary_name": "busybox-initramfs",
            "binary_version": "1:1.30.1-7ubuntu2"
          },
          {
            "binary_name": "busybox-static",
            "binary_version": "1:1.30.1-7ubuntu2"
          },
          {
            "binary_name": "busybox-syslogd",
            "binary_version": "1:1.30.1-7ubuntu2"
          },
          {
            "binary_name": "udhcpc",
            "binary_version": "1:1.30.1-7ubuntu2"
          },
          {
            "binary_name": "udhcpd",
            "binary_version": "1:1.30.1-7ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "busybox",
        "purl": "pkg:deb/ubuntu/busybox@1:1.30.1-7ubuntu2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:1.30.1-7ubuntu2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:1.30.1-6ubuntu3",
        "1:1.30.1-7ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.",
  "id": "UBUNTU-CVE-2021-28831",
  "modified": "2025-09-08T16:47:04Z",
  "published": "2021-03-19T05:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-28831"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5179-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5179-2"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6335-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-28831"
    }
  ],
  "related": [
    "USN-5179-1",
    "USN-5179-2",
    "USN-6335-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-28831"
  ]
}



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Nomenclature

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